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Finding the Fourth Proportional to 115,920.76, 159,813.58 and 99,105.63

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Solution

The fourth proportional to 115,920.76, 159,813.58 and 99,105.63 is: 136,631.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,920.76 : 159,813.58 = 99,105.63 : x
  2. Step 2: Convert to fraction form
    115,920.76/159,813.58 = 99,105.63/x
  3. Step 3: Cross multiply
    115,920.76x = 159,813.58 × 99,105.63
  4. Step 4: Simplify right side
    115,920.76x = 15,838,425,766.16
  5. Step 5: Solve for x
    x = 15,838,425,766.16/115,920.76
  6. Step 6: Final answer
    x = 136,631.49

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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.