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Finding the Fourth Proportional to 113,609.40, 156,768.12 and 65,852.88

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Solution

The fourth proportional to 113,609.40, 156,768.12 and 65,852.88 is: 90,869.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,609.40 : 156,768.12 = 65,852.88 : x
  2. Step 2: Convert to fraction form
    113,609.40/156,768.12 = 65,852.88/x
  3. Step 3: Cross multiply
    113,609.40x = 156,768.12 × 65,852.88
  4. Step 4: Simplify right side
    113,609.40x = 10,323,632,194.19
  5. Step 5: Solve for x
    x = 10,323,632,194.19/113,609.40
  6. Step 6: Final answer
    x = 90,869.52

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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.