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Finding the Fourth Proportional to 65,711.80, 98,567.70 and 28,289.80

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Solution

The fourth proportional to 65,711.80, 98,567.70 and 28,289.80 is: 42,434.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,711.80 : 98,567.70 = 28,289.80 : x
  2. Step 2: Convert to fraction form
    65,711.80/98,567.70 = 28,289.80/x
  3. Step 3: Cross multiply
    65,711.80x = 98,567.70 × 28,289.80
  4. Step 4: Simplify right side
    65,711.80x = 2,788,460,519.46
  5. Step 5: Solve for x
    x = 2,788,460,519.46/65,711.80
  6. Step 6: Final answer
    x = 42,434.70

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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.