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Finding the Fourth Proportional to 113,156.63, 156,138.75 and 65,400.74

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Solution

The fourth proportional to 113,156.63, 156,138.75 and 65,400.74 is: 90,242.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,156.63 : 156,138.75 = 65,400.74 : x
  2. Step 2: Convert to fraction form
    113,156.63/156,138.75 = 65,400.74/x
  3. Step 3: Cross multiply
    113,156.63x = 156,138.75 × 65,400.74
  4. Step 4: Simplify right side
    113,156.63x = 10,211,589,011.98
  5. Step 5: Solve for x
    x = 10,211,589,011.98/113,156.63
  6. Step 6: Final answer
    x = 90,242.96

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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.