Home / 131,328,986.80-196,993,480.20-76,909,428.40

Finding the Fourth Proportional to 131,328,986.80, 196,993,480.20 and 76,909,428.40

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Solution

The fourth proportional to 131,328,986.80, 196,993,480.20 and 76,909,428.40 is: 115,364,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,328,986.80 : 196,993,480.20 = 76,909,428.40 : x
  2. Step 2: Convert to fraction form
    131,328,986.80/196,993,480.20 = 76,909,428.40/x
  3. Step 3: Cross multiply
    131,328,986.80x = 196,993,480.20 × 76,909,428.40
  4. Step 4: Simplify right side
    131,328,986.80x = 15,150,655,960,708,718
  5. Step 5: Solve for x
    x = 15,150,655,960,708,718/131,328,986.80
  6. Step 6: Final answer
    x = 115,364,142.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.