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Finding the Fourth Proportional to 124,425.80, 186,638.70 and 74,659.40

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Solution

The fourth proportional to 124,425.80, 186,638.70 and 74,659.40 is: 111,989.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,425.80 : 186,638.70 = 74,659.40 : x
  2. Step 2: Convert to fraction form
    124,425.80/186,638.70 = 74,659.40/x
  3. Step 3: Cross multiply
    124,425.80x = 186,638.70 × 74,659.40
  4. Step 4: Simplify right side
    124,425.80x = 13,934,333,358.78
  5. Step 5: Solve for x
    x = 13,934,333,358.78/124,425.80
  6. Step 6: Final answer
    x = 111,989.10

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1.5x scale

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.