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Finding the Fourth Proportional to 113,117.20, 169,675.80 and 65,813.20

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Solution

The fourth proportional to 113,117.20, 169,675.80 and 65,813.20 is: 98,719.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,117.20 : 169,675.80 = 65,813.20 : x
  2. Step 2: Convert to fraction form
    113,117.20/169,675.80 = 65,813.20/x
  3. Step 3: Cross multiply
    113,117.20x = 169,675.80 × 65,813.20
  4. Step 4: Simplify right side
    113,117.20x = 11,166,907,360.56
  5. Step 5: Solve for x
    x = 11,166,907,360.56/113,117.20
  6. Step 6: Final answer
    x = 98,719.80

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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.