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Finding the Fourth Proportional to 77,840.80, 107,423.28 and 43,862.80

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Solution

The fourth proportional to 77,840.80, 107,423.28 and 43,862.80 is: 60,532.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,840.80 : 107,423.28 = 43,862.80 : x
  2. Step 2: Convert to fraction form
    77,840.80/107,423.28 = 43,862.80/x
  3. Step 3: Cross multiply
    77,840.80x = 107,423.28 × 43,862.80
  4. Step 4: Simplify right side
    77,840.80x = 4,711,885,845.98
  5. Step 5: Solve for x
    x = 4,711,885,845.98/77,840.80
  6. Step 6: Final answer
    x = 60,532.34

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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.