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Finding the Fourth Proportional to 115,853.90, 159,880.80 and 65,552.90

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Solution

The fourth proportional to 115,853.90, 159,880.80 and 65,552.90 is: 90,464.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,853.90 : 159,880.80 = 65,552.90 : x
  2. Step 2: Convert to fraction form
    115,853.90/159,880.80 = 65,552.90/x
  3. Step 3: Cross multiply
    115,853.90x = 159,880.80 × 65,552.90
  4. Step 4: Simplify right side
    115,853.90x = 10,480,650,094.32
  5. Step 5: Solve for x
    x = 10,480,650,094.32/115,853.90
  6. Step 6: Final answer
    x = 90,464.37

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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.