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Finding the Fourth Proportional to 86,678.83, 130,018.25 and 30,505.71

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Solution

The fourth proportional to 86,678.83, 130,018.25 and 30,505.71 is: 45,758.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,678.83 : 130,018.25 = 30,505.71 : x
  2. Step 2: Convert to fraction form
    86,678.83/130,018.25 = 30,505.71/x
  3. Step 3: Cross multiply
    86,678.83x = 130,018.25 × 30,505.71
  4. Step 4: Simplify right side
    86,678.83x = 3,966,298,876.68
  5. Step 5: Solve for x
    x = 3,966,298,876.68/86,678.83
  6. Step 6: Final answer
    x = 45,758.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.