Home / 128,981.04-193,432.68-45,870

Finding the Fourth Proportional to 128,981.04, 193,432.68 and 45,870

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Solution

The fourth proportional to 128,981.04, 193,432.68 and 45,870 is: 68,791.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,981.04 : 193,432.68 = 45,870 : x
  2. Step 2: Convert to fraction form
    128,981.04/193,432.68 = 45,870/x
  3. Step 3: Cross multiply
    128,981.04x = 193,432.68 × 45,870
  4. Step 4: Simplify right side
    128,981.04x = 8,872,757,031.60
  5. Step 5: Solve for x
    x = 8,872,757,031.60/128,981.04
  6. Step 6: Final answer
    x = 68,791.17

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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.