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Finding the Fourth Proportional to 112,642.86, 155,447.13 and 61,655.69

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Solution

The fourth proportional to 112,642.86, 155,447.13 and 61,655.69 is: 85,084.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,642.86 : 155,447.13 = 61,655.69 : x
  2. Step 2: Convert to fraction form
    112,642.86/155,447.13 = 61,655.69/x
  3. Step 3: Cross multiply
    112,642.86x = 155,447.13 × 61,655.69
  4. Step 4: Simplify right side
    112,642.86x = 9,584,200,678.50
  5. Step 5: Solve for x
    x = 9,584,200,678.50/112,642.86
  6. Step 6: Final answer
    x = 85,084.85

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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.