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Finding the Fourth Proportional to 113,316.72, 156,349.08 and 70,854

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Solution

The fourth proportional to 113,316.72, 156,349.08 and 70,854 is: 97,761.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,316.72 : 156,349.08 = 70,854 : x
  2. Step 2: Convert to fraction form
    113,316.72/156,349.08 = 70,854/x
  3. Step 3: Cross multiply
    113,316.72x = 156,349.08 × 70,854
  4. Step 4: Simplify right side
    113,316.72x = 11,077,957,714.32
  5. Step 5: Solve for x
    x = 11,077,957,714.32/113,316.72
  6. Step 6: Final answer
    x = 97,761.02

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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.