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Finding the Fourth Proportional to 48,422.40, 72,779.40 and 42,007.20

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Solution

The fourth proportional to 48,422.40, 72,779.40 and 42,007.20 is: 63,137.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,422.40 : 72,779.40 = 42,007.20 : x
  2. Step 2: Convert to fraction form
    48,422.40/72,779.40 = 42,007.20/x
  3. Step 3: Cross multiply
    48,422.40x = 72,779.40 × 42,007.20
  4. Step 4: Simplify right side
    48,422.40x = 3,057,258,811.68
  5. Step 5: Solve for x
    x = 3,057,258,811.68/48,422.40
  6. Step 6: Final answer
    x = 63,137.28

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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.