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Finding the Fourth Proportional to 115,015.80, 158,721.48 and 64,714.80

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Solution

The fourth proportional to 115,015.80, 158,721.48 and 64,714.80 is: 89,306.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,015.80 : 158,721.48 = 64,714.80 : x
  2. Step 2: Convert to fraction form
    115,015.80/158,721.48 = 64,714.80/x
  3. Step 3: Cross multiply
    115,015.80x = 158,721.48 × 64,714.80
  4. Step 4: Simplify right side
    115,015.80x = 10,271,628,833.90
  5. Step 5: Solve for x
    x = 10,271,628,833.90/115,015.80
  6. Step 6: Final answer
    x = 89,306.24

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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.