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Finding the Fourth Proportional to 77,645.79, 107,177.58 and 53,803.85

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Solution

The fourth proportional to 77,645.79, 107,177.58 and 53,803.85 is: 74,267.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,645.79 : 107,177.58 = 53,803.85 : x
  2. Step 2: Convert to fraction form
    77,645.79/107,177.58 = 53,803.85/x
  3. Step 3: Cross multiply
    77,645.79x = 107,177.58 × 53,803.85
  4. Step 4: Simplify right side
    77,645.79x = 5,766,565,901.80
  5. Step 5: Solve for x
    x = 5,766,565,901.80/77,645.79
  6. Step 6: Final answer
    x = 74,267.59

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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.