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Finding the Fourth Proportional to 113,151.20, 169,856.40 and 66,430.40

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Solution

The fourth proportional to 113,151.20, 169,856.40 and 66,430.40 is: 99,721.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,151.20 : 169,856.40 = 66,430.40 : x
  2. Step 2: Convert to fraction form
    113,151.20/169,856.40 = 66,430.40/x
  3. Step 3: Cross multiply
    113,151.20x = 169,856.40 × 66,430.40
  4. Step 4: Simplify right side
    113,151.20x = 11,283,628,594.56
  5. Step 5: Solve for x
    x = 11,283,628,594.56/113,151.20
  6. Step 6: Final answer
    x = 99,721.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.