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Finding the Fourth Proportional to 115,901.40, 173,981.70 and 89,722.20

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Solution

The fourth proportional to 115,901.40, 173,981.70 and 89,722.20 is: 134,683.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,901.40 : 173,981.70 = 89,722.20 : x
  2. Step 2: Convert to fraction form
    115,901.40/173,981.70 = 89,722.20/x
  3. Step 3: Cross multiply
    115,901.40x = 173,981.70 × 89,722.20
  4. Step 4: Simplify right side
    115,901.40x = 15,610,020,883.74
  5. Step 5: Solve for x
    x = 15,610,020,883.74/115,901.40
  6. Step 6: Final answer
    x = 134,683.63

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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.