Home / 78,521.39-108,360.96-42,711.70

Finding the Fourth Proportional to 78,521.39, 108,360.96 and 42,711.70

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Solution

The fourth proportional to 78,521.39, 108,360.96 and 42,711.70 is: 58,942.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,521.39 : 108,360.96 = 42,711.70 : x
  2. Step 2: Convert to fraction form
    78,521.39/108,360.96 = 42,711.70/x
  3. Step 3: Cross multiply
    78,521.39x = 108,360.96 × 42,711.70
  4. Step 4: Simplify right side
    78,521.39x = 4,628,280,815.23
  5. Step 5: Solve for x
    x = 4,628,280,815.23/78,521.39
  6. Step 6: Final answer
    x = 58,942.93

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1.5x scale

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.