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Finding the Fourth Proportional to 112,691.88, 155,509.95 and 61,703.67

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Solution

The fourth proportional to 112,691.88, 155,509.95 and 61,703.67 is: 85,148.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,691.88 : 155,509.95 = 61,703.67 : x
  2. Step 2: Convert to fraction form
    112,691.88/155,509.95 = 61,703.67/x
  3. Step 3: Cross multiply
    112,691.88x = 155,509.95 × 61,703.67
  4. Step 4: Simplify right side
    112,691.88x = 9,595,534,636.52
  5. Step 5: Solve for x
    x = 9,595,534,636.52/112,691.88
  6. Step 6: Final answer
    x = 85,148.41

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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.