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Finding the Fourth Proportional to 65,351.64, 90,151.96 and 42,703.88

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Solution

The fourth proportional to 65,351.64, 90,151.96 and 42,703.88 is: 58,909.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,351.64 : 90,151.96 = 42,703.88 : x
  2. Step 2: Convert to fraction form
    65,351.64/90,151.96 = 42,703.88/x
  3. Step 3: Cross multiply
    65,351.64x = 90,151.96 × 42,703.88
  4. Step 4: Simplify right side
    65,351.64x = 3,849,838,481.60
  5. Step 5: Solve for x
    x = 3,849,838,481.60/65,351.64
  6. Step 6: Final answer
    x = 58,909.59

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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.