Home / 129,317.20-178,445.12-72,727.36

Finding the Fourth Proportional to 129,317.20, 178,445.12 and 72,727.36

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Solution

The fourth proportional to 129,317.20, 178,445.12 and 72,727.36 is: 100,356.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,317.20 : 178,445.12 = 72,727.36 : x
  2. Step 2: Convert to fraction form
    129,317.20/178,445.12 = 72,727.36/x
  3. Step 3: Cross multiply
    129,317.20x = 178,445.12 × 72,727.36
  4. Step 4: Simplify right side
    129,317.20x = 12,977,842,482.48
  5. Step 5: Solve for x
    x = 12,977,842,482.48/129,317.20
  6. Step 6: Final answer
    x = 100,356.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.