Home / 129,033.42-178,061.53-72,447.18

Finding the Fourth Proportional to 129,033.42, 178,061.53 and 72,447.18

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Solution

The fourth proportional to 129,033.42, 178,061.53 and 72,447.18 is: 99,974.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,033.42 : 178,061.53 = 72,447.18 : x
  2. Step 2: Convert to fraction form
    129,033.42/178,061.53 = 72,447.18/x
  3. Step 3: Cross multiply
    129,033.42x = 178,061.53 × 72,447.18
  4. Step 4: Simplify right side
    129,033.42x = 12,900,055,714.99
  5. Step 5: Solve for x
    x = 12,900,055,714.99/129,033.42
  6. Step 6: Final answer
    x = 99,974.53

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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.