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Finding the Fourth Proportional to 115,746.80, 159,729.72 and 65,447.60

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Solution

The fourth proportional to 115,746.80, 159,729.72 and 65,447.60 is: 90,317.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,746.80 : 159,729.72 = 65,447.60 : x
  2. Step 2: Convert to fraction form
    115,746.80/159,729.72 = 65,447.60/x
  3. Step 3: Cross multiply
    115,746.80x = 159,729.72 × 65,447.60
  4. Step 4: Simplify right side
    115,746.80x = 10,453,926,822.67
  5. Step 5: Solve for x
    x = 10,453,926,822.67/115,746.80
  6. Step 6: Final answer
    x = 90,317.20

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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.