Home / 115,128.02-158,874.28-64,140.68

Finding the Fourth Proportional to 115,128.02, 158,874.28 and 64,140.68

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Solution

The fourth proportional to 115,128.02, 158,874.28 and 64,140.68 is: 88,512.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,128.02 : 158,874.28 = 64,140.68 : x
  2. Step 2: Convert to fraction form
    115,128.02/158,874.28 = 64,140.68/x
  3. Step 3: Cross multiply
    115,128.02x = 158,874.28 × 64,140.68
  4. Step 4: Simplify right side
    115,128.02x = 10,190,304,590.54
  5. Step 5: Solve for x
    x = 10,190,304,590.54/115,128.02
  6. Step 6: Final answer
    x = 88,512.81

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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.