Home / 128,973.40-193,460.10-81,734.20

Finding the Fourth Proportional to 128,973.40, 193,460.10 and 81,734.20

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Solution

The fourth proportional to 128,973.40, 193,460.10 and 81,734.20 is: 122,601.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,973.40 : 193,460.10 = 81,734.20 : x
  2. Step 2: Convert to fraction form
    128,973.40/193,460.10 = 81,734.20/x
  3. Step 3: Cross multiply
    128,973.40x = 193,460.10 × 81,734.20
  4. Step 4: Simplify right side
    128,973.40x = 15,812,306,505.42
  5. Step 5: Solve for x
    x = 15,812,306,505.42/128,973.40
  6. Step 6: Final answer
    x = 122,601.30

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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.