Home / 129,280.51-178,417.79-71,930.62

Finding the Fourth Proportional to 129,280.51, 178,417.79 and 71,930.62

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Solution

The fourth proportional to 129,280.51, 178,417.79 and 71,930.62 is: 99,270.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,280.51 : 178,417.79 = 71,930.62 : x
  2. Step 2: Convert to fraction form
    129,280.51/178,417.79 = 71,930.62/x
  3. Step 3: Cross multiply
    129,280.51x = 178,417.79 × 71,930.62
  4. Step 4: Simplify right side
    129,280.51x = 12,833,702,253.73
  5. Step 5: Solve for x
    x = 12,833,702,253.73/129,280.51
  6. Step 6: Final answer
    x = 99,270.20

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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.