Home / 142,308.30-196,386.06-77,778.84

Finding the Fourth Proportional to 142,308.30, 196,386.06 and 77,778.84

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Solution

The fourth proportional to 142,308.30, 196,386.06 and 77,778.84 is: 107,335.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,308.30 : 196,386.06 = 77,778.84 : x
  2. Step 2: Convert to fraction form
    142,308.30/196,386.06 = 77,778.84/x
  3. Step 3: Cross multiply
    142,308.30x = 196,386.06 × 77,778.84
  4. Step 4: Simplify right side
    142,308.30x = 15,274,679,938.97
  5. Step 5: Solve for x
    x = 15,274,679,938.97/142,308.30
  6. Step 6: Final answer
    x = 107,335.13

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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.