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Finding the Fourth Proportional to 112,791, 155,656.68 and 62,490

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Solution

The fourth proportional to 112,791, 155,656.68 and 62,490 is: 86,239.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,791 : 155,656.68 = 62,490 : x
  2. Step 2: Convert to fraction form
    112,791/155,656.68 = 62,490/x
  3. Step 3: Cross multiply
    112,791x = 155,656.68 × 62,490
  4. Step 4: Simplify right side
    112,791x = 9,726,985,933.20
  5. Step 5: Solve for x
    x = 9,726,985,933.20/112,791
  6. Step 6: Final answer
    x = 86,239.03

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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.