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Finding the Fourth Proportional to 108,987.39, 150,397.80 and 63,669.57

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Solution

The fourth proportional to 108,987.39, 150,397.80 and 63,669.57 is: 87,861.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,987.39 : 150,397.80 = 63,669.57 : x
  2. Step 2: Convert to fraction form
    108,987.39/150,397.80 = 63,669.57/x
  3. Step 3: Cross multiply
    108,987.39x = 150,397.80 × 63,669.57
  4. Step 4: Simplify right side
    108,987.39x = 9,575,763,254.95
  5. Step 5: Solve for x
    x = 9,575,763,254.95/108,987.39
  6. Step 6: Final answer
    x = 87,861.20

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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.