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Finding the Fourth Proportional to 117,391.68, 176,081.04 and 85,834.08

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Solution

The fourth proportional to 117,391.68, 176,081.04 and 85,834.08 is: 128,746.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,391.68 : 176,081.04 = 85,834.08 : x
  2. Step 2: Convert to fraction form
    117,391.68/176,081.04 = 85,834.08/x
  3. Step 3: Cross multiply
    117,391.68x = 176,081.04 × 85,834.08
  4. Step 4: Simplify right side
    117,391.68x = 15,113,754,073.84
  5. Step 5: Solve for x
    x = 15,113,754,073.84/117,391.68
  6. Step 6: Final answer
    x = 128,746.38

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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.