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Finding the Fourth Proportional to 134,035.65, 185,010.72 and 86,289

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Solution

The fourth proportional to 134,035.65, 185,010.72 and 86,289 is: 119,105.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,035.65 : 185,010.72 = 86,289 : x
  2. Step 2: Convert to fraction form
    134,035.65/185,010.72 = 86,289/x
  3. Step 3: Cross multiply
    134,035.65x = 185,010.72 × 86,289
  4. Step 4: Simplify right side
    134,035.65x = 15,964,390,018.08
  5. Step 5: Solve for x
    x = 15,964,390,018.08/134,035.65
  6. Step 6: Final answer
    x = 119,105.55

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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.