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Finding the Fourth Proportional to 131,658.88, 181,690.57 and 71,230.82

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Solution

The fourth proportional to 131,658.88, 181,690.57 and 71,230.82 is: 98,299.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,658.88 : 181,690.57 = 71,230.82 : x
  2. Step 2: Convert to fraction form
    131,658.88/181,690.57 = 71,230.82/x
  3. Step 3: Cross multiply
    131,658.88x = 181,690.57 × 71,230.82
  4. Step 4: Simplify right side
    131,658.88x = 12,941,967,931.21
  5. Step 5: Solve for x
    x = 12,941,967,931.21/131,658.88
  6. Step 6: Final answer
    x = 98,299.24

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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.