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Finding the Fourth Proportional to 115,435.66, 158,945.88 and 98,401.72

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Solution

The fourth proportional to 115,435.66, 158,945.88 and 98,401.72 is: 135,491.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,435.66 : 158,945.88 = 98,401.72 : x
  2. Step 2: Convert to fraction form
    115,435.66/158,945.88 = 98,401.72/x
  3. Step 3: Cross multiply
    115,435.66x = 158,945.88 × 98,401.72
  4. Step 4: Simplify right side
    115,435.66x = 15,640,547,978.91
  5. Step 5: Solve for x
    x = 15,640,547,978.91/115,435.66
  6. Step 6: Final answer
    x = 135,491.48

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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.