Home / 128,253.84-176,990.16-71,665.20

Finding the Fourth Proportional to 128,253.84, 176,990.16 and 71,665.20

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Solution

The fourth proportional to 128,253.84, 176,990.16 and 71,665.20 is: 98,897.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,253.84 : 176,990.16 = 71,665.20 : x
  2. Step 2: Convert to fraction form
    128,253.84/176,990.16 = 71,665.20/x
  3. Step 3: Cross multiply
    128,253.84x = 176,990.16 × 71,665.20
  4. Step 4: Simplify right side
    128,253.84x = 12,684,035,214.43
  5. Step 5: Solve for x
    x = 12,684,035,214.43/128,253.84
  6. Step 6: Final answer
    x = 98,897.90

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1.5x scale

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.