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Finding the Fourth Proportional to 90,387.76, 124,739.28 and 50,102.40

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Solution

The fourth proportional to 90,387.76, 124,739.28 and 50,102.40 is: 69,143.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,387.76 : 124,739.28 = 50,102.40 : x
  2. Step 2: Convert to fraction form
    90,387.76/124,739.28 = 50,102.40/x
  3. Step 3: Cross multiply
    90,387.76x = 124,739.28 × 50,102.40
  4. Step 4: Simplify right side
    90,387.76x = 6,249,737,302.27
  5. Step 5: Solve for x
    x = 6,249,737,302.27/90,387.76
  6. Step 6: Final answer
    x = 69,143.62

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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.