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Finding the Fourth Proportional to 72,480.65, 100,030.01 and 42,275.75

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Solution

The fourth proportional to 72,480.65, 100,030.01 and 42,275.75 is: 58,344.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,480.65 : 100,030.01 = 42,275.75 : x
  2. Step 2: Convert to fraction form
    72,480.65/100,030.01 = 42,275.75/x
  3. Step 3: Cross multiply
    72,480.65x = 100,030.01 × 42,275.75
  4. Step 4: Simplify right side
    72,480.65x = 4,228,842,983.73
  5. Step 5: Solve for x
    x = 4,228,842,983.73/72,480.65
  6. Step 6: Final answer
    x = 58,344.44

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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.