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Finding the Fourth Proportional to 124,064.80, 186,048.60 and 45,138.40

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Solution

The fourth proportional to 124,064.80, 186,048.60 and 45,138.40 is: 67,689.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,064.80 : 186,048.60 = 45,138.40 : x
  2. Step 2: Convert to fraction form
    124,064.80/186,048.60 = 45,138.40/x
  3. Step 3: Cross multiply
    124,064.80x = 186,048.60 × 45,138.40
  4. Step 4: Simplify right side
    124,064.80x = 8,397,936,126.24
  5. Step 5: Solve for x
    x = 8,397,936,126.24/124,064.80
  6. Step 6: Final answer
    x = 67,689.92

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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.