Home / 103,422.90-142,778.08-69,609.18

Finding the Fourth Proportional to 103,422.90, 142,778.08 and 69,609.18

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Solution

The fourth proportional to 103,422.90, 142,778.08 and 69,609.18 is: 96,097.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,422.90 : 142,778.08 = 69,609.18 : x
  2. Step 2: Convert to fraction form
    103,422.90/142,778.08 = 69,609.18/x
  3. Step 3: Cross multiply
    103,422.90x = 142,778.08 × 69,609.18
  4. Step 4: Simplify right side
    103,422.90x = 9,938,665,070.77
  5. Step 5: Solve for x
    x = 9,938,665,070.77/103,422.90
  6. Step 6: Final answer
    x = 96,097.34

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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.