Home / 142,207.76-196,238.76-78,543.92

Finding the Fourth Proportional to 142,207.76, 196,238.76 and 78,543.92

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Solution

The fourth proportional to 142,207.76, 196,238.76 and 78,543.92 is: 108,386.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,207.76 : 196,238.76 = 78,543.92 : x
  2. Step 2: Convert to fraction form
    142,207.76/196,238.76 = 78,543.92/x
  3. Step 3: Cross multiply
    142,207.76x = 196,238.76 × 78,543.92
  4. Step 4: Simplify right side
    142,207.76x = 15,413,361,466.34
  5. Step 5: Solve for x
    x = 15,413,361,466.34/142,207.76
  6. Step 6: Final answer
    x = 108,386.22

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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.