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Finding the Fourth Proportional to 104,916.40, 157,763.40 and 87,809.20

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Solution

The fourth proportional to 104,916.40, 157,763.40 and 87,809.20 is: 132,039.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,916.40 : 157,763.40 = 87,809.20 : x
  2. Step 2: Convert to fraction form
    104,916.40/157,763.40 = 87,809.20/x
  3. Step 3: Cross multiply
    104,916.40x = 157,763.40 × 87,809.20
  4. Step 4: Simplify right side
    104,916.40x = 13,853,077,943.28
  5. Step 5: Solve for x
    x = 13,853,077,943.28/104,916.40
  6. Step 6: Final answer
    x = 132,039.20

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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.