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Finding the Fourth Proportional to 72,948.80, 109,358.40 and 48,000.80

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Solution

The fourth proportional to 72,948.80, 109,358.40 and 48,000.80 is: 71,958.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,948.80 : 109,358.40 = 48,000.80 : x
  2. Step 2: Convert to fraction form
    72,948.80/109,358.40 = 48,000.80/x
  3. Step 3: Cross multiply
    72,948.80x = 109,358.40 × 48,000.80
  4. Step 4: Simplify right side
    72,948.80x = 5,249,290,686.72
  5. Step 5: Solve for x
    x = 5,249,290,686.72/72,948.80
  6. Step 6: Final answer
    x = 71,958.56

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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.