Home / 129,612.96-178,916.04-101,327.76

Finding the Fourth Proportional to 129,612.96, 178,916.04 and 101,327.76

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Solution

The fourth proportional to 129,612.96, 178,916.04 and 101,327.76 is: 139,871.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,612.96 : 178,916.04 = 101,327.76 : x
  2. Step 2: Convert to fraction form
    129,612.96/178,916.04 = 101,327.76/x
  3. Step 3: Cross multiply
    129,612.96x = 178,916.04 × 101,327.76
  4. Step 4: Simplify right side
    129,612.96x = 18,129,161,561.27
  5. Step 5: Solve for x
    x = 18,129,161,561.27/129,612.96
  6. Step 6: Final answer
    x = 139,871.52

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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.