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Finding the Fourth Proportional to 90,630.31, 135,805.74 and 48,515.98

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Solution

The fourth proportional to 90,630.31, 135,805.74 and 48,515.98 is: 72,699.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,630.31 : 135,805.74 = 48,515.98 : x
  2. Step 2: Convert to fraction form
    90,630.31/135,805.74 = 48,515.98/x
  3. Step 3: Cross multiply
    90,630.31x = 135,805.74 × 48,515.98
  4. Step 4: Simplify right side
    90,630.31x = 6,588,748,565.73
  5. Step 5: Solve for x
    x = 6,588,748,565.73/90,630.31
  6. Step 6: Final answer
    x = 72,699.17

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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.