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Finding the Fourth Proportional to 58,909.90, 88,360.80 and 18,928.30

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Solution

The fourth proportional to 58,909.90, 88,360.80 and 18,928.30 is: 28,391.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,909.90 : 88,360.80 = 18,928.30 : x
  2. Step 2: Convert to fraction form
    58,909.90/88,360.80 = 18,928.30/x
  3. Step 3: Cross multiply
    58,909.90x = 88,360.80 × 18,928.30
  4. Step 4: Simplify right side
    58,909.90x = 1,672,519,730.64
  5. Step 5: Solve for x
    x = 1,672,519,730.64/58,909.90
  6. Step 6: Final answer
    x = 28,391.15

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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.