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Finding the Fourth Proportional to 117,487.12, 162,140.12 and 66,499.76

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Solution

The fourth proportional to 117,487.12, 162,140.12 and 66,499.76 is: 91,774.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,487.12 : 162,140.12 = 66,499.76 : x
  2. Step 2: Convert to fraction form
    117,487.12/162,140.12 = 66,499.76/x
  3. Step 3: Cross multiply
    117,487.12x = 162,140.12 × 66,499.76
  4. Step 4: Simplify right side
    117,487.12x = 10,782,279,066.37
  5. Step 5: Solve for x
    x = 10,782,279,066.37/117,487.12
  6. Step 6: Final answer
    x = 91,774.14

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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.