Home / 142,240.74-196,291.05-78,577.20

Finding the Fourth Proportional to 142,240.74, 196,291.05 and 78,577.20

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Solution

The fourth proportional to 142,240.74, 196,291.05 and 78,577.20 is: 108,435.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,240.74 : 196,291.05 = 78,577.20 : x
  2. Step 2: Convert to fraction form
    142,240.74/196,291.05 = 78,577.20/x
  3. Step 3: Cross multiply
    142,240.74x = 196,291.05 × 78,577.20
  4. Step 4: Simplify right side
    142,240.74x = 15,424,001,094.06
  5. Step 5: Solve for x
    x = 15,424,001,094.06/142,240.74
  6. Step 6: Final answer
    x = 108,435.89

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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.