Home / 78,768.80-118,153.20-26,186.40

Finding the Fourth Proportional to 78,768.80, 118,153.20 and 26,186.40

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Solution

The fourth proportional to 78,768.80, 118,153.20 and 26,186.40 is: 39,279.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,768.80 : 118,153.20 = 26,186.40 : x
  2. Step 2: Convert to fraction form
    78,768.80/118,153.20 = 26,186.40/x
  3. Step 3: Cross multiply
    78,768.80x = 118,153.20 × 26,186.40
  4. Step 4: Simplify right side
    78,768.80x = 3,094,006,956.48
  5. Step 5: Solve for x
    x = 3,094,006,956.48/78,768.80
  6. Step 6: Final answer
    x = 39,279.60

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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.