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Finding the Fourth Proportional to 124,512.90, 186,769.35 and 86,459.10

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Solution

The fourth proportional to 124,512.90, 186,769.35 and 86,459.10 is: 129,688.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,512.90 : 186,769.35 = 86,459.10 : x
  2. Step 2: Convert to fraction form
    124,512.90/186,769.35 = 86,459.10/x
  3. Step 3: Cross multiply
    124,512.90x = 186,769.35 × 86,459.10
  4. Step 4: Simplify right side
    124,512.90x = 16,147,909,908.59
  5. Step 5: Solve for x
    x = 16,147,909,908.59/124,512.90
  6. Step 6: Final answer
    x = 129,688.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.