Home / 129,587.73-178,832.85-72,225.45

Finding the Fourth Proportional to 129,587.73, 178,832.85 and 72,225.45

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Solution

The fourth proportional to 129,587.73, 178,832.85 and 72,225.45 is: 99,672.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,587.73 : 178,832.85 = 72,225.45 : x
  2. Step 2: Convert to fraction form
    129,587.73/178,832.85 = 72,225.45/x
  3. Step 3: Cross multiply
    129,587.73x = 178,832.85 × 72,225.45
  4. Step 4: Simplify right side
    129,587.73x = 12,916,283,066.03
  5. Step 5: Solve for x
    x = 12,916,283,066.03/129,587.73
  6. Step 6: Final answer
    x = 99,672.11

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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.