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Finding the Fourth Proportional to 130,147, 179,602.98 and 70,531

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Solution

The fourth proportional to 130,147, 179,602.98 and 70,531 is: 97,332.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,147 : 179,602.98 = 70,531 : x
  2. Step 2: Convert to fraction form
    130,147/179,602.98 = 70,531/x
  3. Step 3: Cross multiply
    130,147x = 179,602.98 × 70,531
  4. Step 4: Simplify right side
    130,147x = 12,667,577,782.38
  5. Step 5: Solve for x
    x = 12,667,577,782.38/130,147
  6. Step 6: Final answer
    x = 97,332.85

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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.