Home / 78,122.28-117,159.48-28,196.28

Finding the Fourth Proportional to 78,122.28, 117,159.48 and 28,196.28

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Solution

The fourth proportional to 78,122.28, 117,159.48 and 28,196.28 is: 42,285.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,122.28 : 117,159.48 = 28,196.28 : x
  2. Step 2: Convert to fraction form
    78,122.28/117,159.48 = 28,196.28/x
  3. Step 3: Cross multiply
    78,122.28x = 117,159.48 × 28,196.28
  4. Step 4: Simplify right side
    78,122.28x = 3,303,461,502.73
  5. Step 5: Solve for x
    x = 3,303,461,502.73/78,122.28
  6. Step 6: Final answer
    x = 42,285.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.