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Finding the Fourth Proportional to 78,366.80, 116,724.43 and 76,726.55

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Solution

The fourth proportional to 78,366.80, 116,724.43 and 76,726.55 is: 114,281.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,366.80 : 116,724.43 = 76,726.55 : x
  2. Step 2: Convert to fraction form
    78,366.80/116,724.43 = 76,726.55/x
  3. Step 3: Cross multiply
    78,366.80x = 116,724.43 × 76,726.55
  4. Step 4: Simplify right side
    78,366.80x = 8,955,862,039.18
  5. Step 5: Solve for x
    x = 8,955,862,039.18/78,366.80
  6. Step 6: Final answer
    x = 114,281.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.