Home / 78,465.18-108,284.10-42,657.66

Finding the Fourth Proportional to 78,465.18, 108,284.10 and 42,657.66

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Solution

The fourth proportional to 78,465.18, 108,284.10 and 42,657.66 is: 58,868.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,465.18 : 108,284.10 = 42,657.66 : x
  2. Step 2: Convert to fraction form
    78,465.18/108,284.10 = 42,657.66/x
  3. Step 3: Cross multiply
    78,465.18x = 108,284.10 × 42,657.66
  4. Step 4: Simplify right side
    78,465.18x = 4,619,146,321.21
  5. Step 5: Solve for x
    x = 4,619,146,321.21/78,465.18
  6. Step 6: Final answer
    x = 58,868.74

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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.