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Finding the Fourth Proportional to 113,720.70, 156,941.92 and 65,990.10

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Solution

The fourth proportional to 113,720.70, 156,941.92 and 65,990.10 is: 91,070.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,720.70 : 156,941.92 = 65,990.10 : x
  2. Step 2: Convert to fraction form
    113,720.70/156,941.92 = 65,990.10/x
  3. Step 3: Cross multiply
    113,720.70x = 156,941.92 × 65,990.10
  4. Step 4: Simplify right side
    113,720.70x = 10,356,612,994.99
  5. Step 5: Solve for x
    x = 10,356,612,994.99/113,720.70
  6. Step 6: Final answer
    x = 91,070.61

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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.