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Finding the Fourth Proportional to 64,987.68, 89,683.62 and 38,130.65

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Solution

The fourth proportional to 64,987.68, 89,683.62 and 38,130.65 is: 52,620.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,987.68 : 89,683.62 = 38,130.65 : x
  2. Step 2: Convert to fraction form
    64,987.68/89,683.62 = 38,130.65/x
  3. Step 3: Cross multiply
    64,987.68x = 89,683.62 × 38,130.65
  4. Step 4: Simplify right side
    64,987.68x = 3,419,694,684.34
  5. Step 5: Solve for x
    x = 3,419,694,684.34/64,987.68
  6. Step 6: Final answer
    x = 52,620.66

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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.