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Finding the Fourth Proportional to 113,112, 156,108.96 and 68,400.32

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Solution

The fourth proportional to 113,112, 156,108.96 and 68,400.32 is: 94,401.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,112 : 156,108.96 = 68,400.32 : x
  2. Step 2: Convert to fraction form
    113,112/156,108.96 = 68,400.32/x
  3. Step 3: Cross multiply
    113,112x = 156,108.96 × 68,400.32
  4. Step 4: Simplify right side
    113,112x = 10,677,902,818.87
  5. Step 5: Solve for x
    x = 10,677,902,818.87/113,112
  6. Step 6: Final answer
    x = 94,401.15

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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.