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Finding the Fourth Proportional to 65,248.88, 90,061.20 and 38,400.04

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Solution

The fourth proportional to 65,248.88, 90,061.20 and 38,400.04 is: 53,002.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,248.88 : 90,061.20 = 38,400.04 : x
  2. Step 2: Convert to fraction form
    65,248.88/90,061.20 = 38,400.04/x
  3. Step 3: Cross multiply
    65,248.88x = 90,061.20 × 38,400.04
  4. Step 4: Simplify right side
    65,248.88x = 3,458,353,682.45
  5. Step 5: Solve for x
    x = 3,458,353,682.45/65,248.88
  6. Step 6: Final answer
    x = 53,002.50

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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.