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Finding the Fourth Proportional to 87,071.69, 130,665.79 and 31,667.69

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Solution

The fourth proportional to 87,071.69, 130,665.79 and 31,667.69 is: 47,522.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,071.69 : 130,665.79 = 31,667.69 : x
  2. Step 2: Convert to fraction form
    87,071.69/130,665.79 = 31,667.69/x
  3. Step 3: Cross multiply
    87,071.69x = 130,665.79 × 31,667.69
  4. Step 4: Simplify right side
    87,071.69x = 4,137,884,097.57
  5. Step 5: Solve for x
    x = 4,137,884,097.57/87,071.69
  6. Step 6: Final answer
    x = 47,522.72

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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.