Home / 142,345.20-196,432.92-78,681.36

Finding the Fourth Proportional to 142,345.20, 196,432.92 and 78,681.36

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Solution

The fourth proportional to 142,345.20, 196,432.92 and 78,681.36 is: 108,578.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,345.20 : 196,432.92 = 78,681.36 : x
  2. Step 2: Convert to fraction form
    142,345.20/196,432.92 = 78,681.36/x
  3. Step 3: Cross multiply
    142,345.20x = 196,432.92 × 78,681.36
  4. Step 4: Simplify right side
    142,345.20x = 15,455,609,294.37
  5. Step 5: Solve for x
    x = 15,455,609,294.37/142,345.20
  6. Step 6: Final answer
    x = 108,578.37

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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.