Home / 128,521.10-177,354.27-71,159.28

Finding the Fourth Proportional to 128,521.10, 177,354.27 and 71,159.28

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Solution

The fourth proportional to 128,521.10, 177,354.27 and 71,159.28 is: 98,197.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,521.10 : 177,354.27 = 71,159.28 : x
  2. Step 2: Convert to fraction form
    128,521.10/177,354.27 = 71,159.28/x
  3. Step 3: Cross multiply
    128,521.10x = 177,354.27 × 71,159.28
  4. Step 4: Simplify right side
    128,521.10x = 12,620,402,158.13
  5. Step 5: Solve for x
    x = 12,620,402,158.13/128,521.10
  6. Step 6: Final answer
    x = 98,197.13

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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.