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Finding the Fourth Proportional to 109,487.80, 163,903.65 and 65,091.70

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Solution

The fourth proportional to 109,487.80, 163,903.65 and 65,091.70 is: 97,442.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,487.80 : 163,903.65 = 65,091.70 : x
  2. Step 2: Convert to fraction form
    109,487.80/163,903.65 = 65,091.70/x
  3. Step 3: Cross multiply
    109,487.80x = 163,903.65 × 65,091.70
  4. Step 4: Simplify right side
    109,487.80x = 10,668,767,214.71
  5. Step 5: Solve for x
    x = 10,668,767,214.71/109,487.80
  6. Step 6: Final answer
    x = 97,442.52

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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.