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Finding the Fourth Proportional to 60,661.56, 90,909.30 and 38,490.51

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Solution

The fourth proportional to 60,661.56, 90,909.30 and 38,490.51 is: 57,683.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,661.56 : 90,909.30 = 38,490.51 : x
  2. Step 2: Convert to fraction form
    60,661.56/90,909.30 = 38,490.51/x
  3. Step 3: Cross multiply
    60,661.56x = 90,909.30 × 38,490.51
  4. Step 4: Simplify right side
    60,661.56x = 3,499,145,805.99
  5. Step 5: Solve for x
    x = 3,499,145,805.99/60,661.56
  6. Step 6: Final answer
    x = 57,683.08

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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.