Home / 83,390.20-115,095.85-76,665.18

Finding the Fourth Proportional to 83,390.20, 115,095.85 and 76,665.18

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Solution

The fourth proportional to 83,390.20, 115,095.85 and 76,665.18 is: 105,813.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,390.20 : 115,095.85 = 76,665.18 : x
  2. Step 2: Convert to fraction form
    83,390.20/115,095.85 = 76,665.18/x
  3. Step 3: Cross multiply
    83,390.20x = 115,095.85 × 76,665.18
  4. Step 4: Simplify right side
    83,390.20x = 8,823,843,482.02
  5. Step 5: Solve for x
    x = 8,823,843,482.02/83,390.20
  6. Step 6: Final answer
    x = 105,813.91

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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.