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Finding the Fourth Proportional to 131,308, 181,205.12 and 71,692

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Solution

The fourth proportional to 131,308, 181,205.12 and 71,692 is: 98,935.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,308 : 181,205.12 = 71,692 : x
  2. Step 2: Convert to fraction form
    131,308/181,205.12 = 71,692/x
  3. Step 3: Cross multiply
    131,308x = 181,205.12 × 71,692
  4. Step 4: Simplify right side
    131,308x = 12,990,957,463.04
  5. Step 5: Solve for x
    x = 12,990,957,463.04/131,308
  6. Step 6: Final answer
    x = 98,935.00

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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.