Home / 83,981.56-115,857.12-56,748.92

Finding the Fourth Proportional to 83,981.56, 115,857.12 and 56,748.92

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Solution

The fourth proportional to 83,981.56, 115,857.12 and 56,748.92 is: 78,288.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,981.56 : 115,857.12 = 56,748.92 : x
  2. Step 2: Convert to fraction form
    83,981.56/115,857.12 = 56,748.92/x
  3. Step 3: Cross multiply
    83,981.56x = 115,857.12 × 56,748.92
  4. Step 4: Simplify right side
    83,981.56x = 6,574,766,434.31
  5. Step 5: Solve for x
    x = 6,574,766,434.31/83,981.56
  6. Step 6: Final answer
    x = 78,288.22

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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.