Home / 142,281.90-196,331.04-78,619.95

Finding the Fourth Proportional to 142,281.90, 196,331.04 and 78,619.95

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Solution

The fourth proportional to 142,281.90, 196,331.04 and 78,619.95 is: 108,485.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,281.90 : 196,331.04 = 78,619.95 : x
  2. Step 2: Convert to fraction form
    142,281.90/196,331.04 = 78,619.95/x
  3. Step 3: Cross multiply
    142,281.90x = 196,331.04 × 78,619.95
  4. Step 4: Simplify right side
    142,281.90x = 15,435,536,548.25
  5. Step 5: Solve for x
    x = 15,435,536,548.25/142,281.90
  6. Step 6: Final answer
    x = 108,485.59

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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.