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Finding the Fourth Proportional to 48,628.80, 72,986.40 and 42,062.40

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Solution

The fourth proportional to 48,628.80, 72,986.40 and 42,062.40 is: 63,130.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,628.80 : 72,986.40 = 42,062.40 : x
  2. Step 2: Convert to fraction form
    48,628.80/72,986.40 = 42,062.40/x
  3. Step 3: Cross multiply
    48,628.80x = 72,986.40 × 42,062.40
  4. Step 4: Simplify right side
    48,628.80x = 3,069,983,151.36
  5. Step 5: Solve for x
    x = 3,069,983,151.36/48,628.80
  6. Step 6: Final answer
    x = 63,130.97

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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.