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Finding the Fourth Proportional to 113,370.28, 156,385.86 and 70,855

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Solution

The fourth proportional to 113,370.28, 156,385.86 and 70,855 is: 97,739.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,370.28 : 156,385.86 = 70,855 : x
  2. Step 2: Convert to fraction form
    113,370.28/156,385.86 = 70,855/x
  3. Step 3: Cross multiply
    113,370.28x = 156,385.86 × 70,855
  4. Step 4: Simplify right side
    113,370.28x = 11,080,720,110.30
  5. Step 5: Solve for x
    x = 11,080,720,110.30/113,370.28
  6. Step 6: Final answer
    x = 97,739.20

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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.