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Finding the Fourth Proportional to 65,711.70, 98,567.55 and 47,999.70

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Solution

The fourth proportional to 65,711.70, 98,567.55 and 47,999.70 is: 71,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,711.70 : 98,567.55 = 47,999.70 : x
  2. Step 2: Convert to fraction form
    65,711.70/98,567.55 = 47,999.70/x
  3. Step 3: Cross multiply
    65,711.70x = 98,567.55 × 47,999.70
  4. Step 4: Simplify right side
    65,711.70x = 4,731,212,829.74
  5. Step 5: Solve for x
    x = 4,731,212,829.74/65,711.70
  6. Step 6: Final answer
    x = 71,999.55

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1.5x scale

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.