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Finding the Fourth Proportional to 73,891.20, 110,836.80 and 42,710.40

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Solution

The fourth proportional to 73,891.20, 110,836.80 and 42,710.40 is: 64,065.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,891.20 : 110,836.80 = 42,710.40 : x
  2. Step 2: Convert to fraction form
    73,891.20/110,836.80 = 42,710.40/x
  3. Step 3: Cross multiply
    73,891.20x = 110,836.80 × 42,710.40
  4. Step 4: Simplify right side
    73,891.20x = 4,733,884,062.72
  5. Step 5: Solve for x
    x = 4,733,884,062.72/73,891.20
  6. Step 6: Final answer
    x = 64,065.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.