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Finding the Fourth Proportional to 77,280.95, 106,651.72 and 43,287.45

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Solution

The fourth proportional to 77,280.95, 106,651.72 and 43,287.45 is: 59,738.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,280.95 : 106,651.72 = 43,287.45 : x
  2. Step 2: Convert to fraction form
    77,280.95/106,651.72 = 43,287.45/x
  3. Step 3: Cross multiply
    77,280.95x = 106,651.72 × 43,287.45
  4. Step 4: Simplify right side
    77,280.95x = 4,616,680,996.91
  5. Step 5: Solve for x
    x = 4,616,680,996.91/77,280.95
  6. Step 6: Final answer
    x = 59,738.93

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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.