Home / 129,083.79-178,135.04-71,732.45

Finding the Fourth Proportional to 129,083.79, 178,135.04 and 71,732.45

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Solution

The fourth proportional to 129,083.79, 178,135.04 and 71,732.45 is: 98,990.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,083.79 : 178,135.04 = 71,732.45 : x
  2. Step 2: Convert to fraction form
    129,083.79/178,135.04 = 71,732.45/x
  3. Step 3: Cross multiply
    129,083.79x = 178,135.04 × 71,732.45
  4. Step 4: Simplify right side
    129,083.79x = 12,778,061,600.71
  5. Step 5: Solve for x
    x = 12,778,061,600.71/129,083.79
  6. Step 6: Final answer
    x = 98,990.44

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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.