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Finding the Fourth Proportional to 71,488.40, 98,665.81 and 39,667.55

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Solution

The fourth proportional to 71,488.40, 98,665.81 and 39,667.55 is: 54,747.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,488.40 : 98,665.81 = 39,667.55 : x
  2. Step 2: Convert to fraction form
    71,488.40/98,665.81 = 39,667.55/x
  3. Step 3: Cross multiply
    71,488.40x = 98,665.81 × 39,667.55
  4. Step 4: Simplify right side
    71,488.40x = 3,913,830,358.97
  5. Step 5: Solve for x
    x = 3,913,830,358.97/71,488.40
  6. Step 6: Final answer
    x = 54,747.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.