Home / 78,712.83-108,562.28-50,421.15

Finding the Fourth Proportional to 78,712.83, 108,562.28 and 50,421.15

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Solution

The fourth proportional to 78,712.83, 108,562.28 and 50,421.15 is: 69,541.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,712.83 : 108,562.28 = 50,421.15 : x
  2. Step 2: Convert to fraction form
    78,712.83/108,562.28 = 50,421.15/x
  3. Step 3: Cross multiply
    78,712.83x = 108,562.28 × 50,421.15
  4. Step 4: Simplify right side
    78,712.83x = 5,473,834,752.12
  5. Step 5: Solve for x
    x = 5,473,834,752.12/78,712.83
  6. Step 6: Final answer
    x = 69,541.84

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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.