Home / 128,451.15-177,432-98,605.29

Finding the Fourth Proportional to 128,451.15, 177,432 and 98,605.29

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Solution

The fourth proportional to 128,451.15, 177,432 and 98,605.29 is: 136,205.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,451.15 : 177,432 = 98,605.29 : x
  2. Step 2: Convert to fraction form
    128,451.15/177,432 = 98,605.29/x
  3. Step 3: Cross multiply
    128,451.15x = 177,432 × 98,605.29
  4. Step 4: Simplify right side
    128,451.15x = 17,495,733,815.28
  5. Step 5: Solve for x
    x = 17,495,733,815.28/128,451.15
  6. Step 6: Final answer
    x = 136,205.35

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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.