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Finding the Fourth Proportional to 113,154.48, 156,160.44 and 65,419.56

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Solution

The fourth proportional to 113,154.48, 156,160.44 and 65,419.56 is: 90,283.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,154.48 : 156,160.44 = 65,419.56 : x
  2. Step 2: Convert to fraction form
    113,154.48/156,160.44 = 65,419.56/x
  3. Step 3: Cross multiply
    113,154.48x = 156,160.44 × 65,419.56
  4. Step 4: Simplify right side
    113,154.48x = 10,215,947,274.21
  5. Step 5: Solve for x
    x = 10,215,947,274.21/113,154.48
  6. Step 6: Final answer
    x = 90,283.19

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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.