Home / 77,131.04-115,376.60-72,407.12

Finding the Fourth Proportional to 77,131.04, 115,376.60 and 72,407.12

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Solution

The fourth proportional to 77,131.04, 115,376.60 and 72,407.12 is: 108,310.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,131.04 : 115,376.60 = 72,407.12 : x
  2. Step 2: Convert to fraction form
    77,131.04/115,376.60 = 72,407.12/x
  3. Step 3: Cross multiply
    77,131.04x = 115,376.60 × 72,407.12
  4. Step 4: Simplify right side
    77,131.04x = 8,354,086,925.53
  5. Step 5: Solve for x
    x = 8,354,086,925.53/77,131.04
  6. Step 6: Final answer
    x = 108,310.32

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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.