Home / 115,021.12-158,727.52-64,720

Finding the Fourth Proportional to 115,021.12, 158,727.52 and 64,720

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Solution

The fourth proportional to 115,021.12, 158,727.52 and 64,720 is: 89,312.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,021.12 : 158,727.52 = 64,720 : x
  2. Step 2: Convert to fraction form
    115,021.12/158,727.52 = 64,720/x
  3. Step 3: Cross multiply
    115,021.12x = 158,727.52 × 64,720
  4. Step 4: Simplify right side
    115,021.12x = 10,272,845,094.40
  5. Step 5: Solve for x
    x = 10,272,845,094.40/115,021.12
  6. Step 6: Final answer
    x = 89,312.69

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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.