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Finding the Fourth Proportional to 142,478.80, 213,737.40 and 49,013.20

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Solution

The fourth proportional to 142,478.80, 213,737.40 and 49,013.20 is: 73,526.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,478.80 : 213,737.40 = 49,013.20 : x
  2. Step 2: Convert to fraction form
    142,478.80/213,737.40 = 49,013.20/x
  3. Step 3: Cross multiply
    142,478.80x = 213,737.40 × 49,013.20
  4. Step 4: Simplify right side
    142,478.80x = 10,475,953,933.68
  5. Step 5: Solve for x
    x = 10,475,953,933.68/142,478.80
  6. Step 6: Final answer
    x = 73,526.40

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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.