Home / 138,961.60-191,798.49-78,567.22

Finding the Fourth Proportional to 138,961.60, 191,798.49 and 78,567.22

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Solution

The fourth proportional to 138,961.60, 191,798.49 and 78,567.22 is: 108,440.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,961.60 : 191,798.49 = 78,567.22 : x
  2. Step 2: Convert to fraction form
    138,961.60/191,798.49 = 78,567.22/x
  3. Step 3: Cross multiply
    138,961.60x = 191,798.49 × 78,567.22
  4. Step 4: Simplify right side
    138,961.60x = 15,069,074,159.50
  5. Step 5: Solve for x
    x = 15,069,074,159.50/138,961.60
  6. Step 6: Final answer
    x = 108,440.56

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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.