Home / 81,005.60-121,569.96-28,459.28

Finding the Fourth Proportional to 81,005.60, 121,569.96 and 28,459.28

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Solution

The fourth proportional to 81,005.60, 121,569.96 and 28,459.28 is: 42,710.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,005.60 : 121,569.96 = 28,459.28 : x
  2. Step 2: Convert to fraction form
    81,005.60/121,569.96 = 28,459.28/x
  3. Step 3: Cross multiply
    81,005.60x = 121,569.96 × 28,459.28
  4. Step 4: Simplify right side
    81,005.60x = 3,459,793,531.23
  5. Step 5: Solve for x
    x = 3,459,793,531.23/81,005.60
  6. Step 6: Final answer
    x = 42,710.55

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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.