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Finding the Fourth Proportional to 115,434.66, 158,944.50 and 98,400.72

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Solution

The fourth proportional to 115,434.66, 158,944.50 and 98,400.72 is: 135,490.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,434.66 : 158,944.50 = 98,400.72 : x
  2. Step 2: Convert to fraction form
    115,434.66/158,944.50 = 98,400.72/x
  3. Step 3: Cross multiply
    115,434.66x = 158,944.50 × 98,400.72
  4. Step 4: Simplify right side
    115,434.66x = 15,640,253,240.04
  5. Step 5: Solve for x
    x = 15,640,253,240.04/115,434.66
  6. Step 6: Final answer
    x = 135,490.10

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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.