Home / 155,128.16-214,078.20-87,146.48

Finding the Fourth Proportional to 155,128.16, 214,078.20 and 87,146.48

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Solution

The fourth proportional to 155,128.16, 214,078.20 and 87,146.48 is: 120,262.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,128.16 : 214,078.20 = 87,146.48 : x
  2. Step 2: Convert to fraction form
    155,128.16/214,078.20 = 87,146.48/x
  3. Step 3: Cross multiply
    155,128.16x = 214,078.20 × 87,146.48
  4. Step 4: Simplify right side
    155,128.16x = 18,656,161,574.74
  5. Step 5: Solve for x
    x = 18,656,161,574.74/155,128.16
  6. Step 6: Final answer
    x = 120,262.89

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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.