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Finding the Fourth Proportional to 338,741.71, 508,112.76 and 86,041.15

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Solution

The fourth proportional to 338,741.71, 508,112.76 and 86,041.15 is: 129,061.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,741.71 : 508,112.76 = 86,041.15 : x
  2. Step 2: Convert to fraction form
    338,741.71/508,112.76 = 86,041.15/x
  3. Step 3: Cross multiply
    338,741.71x = 508,112.76 × 86,041.15
  4. Step 4: Simplify right side
    338,741.71x = 43,718,606,200.07
  5. Step 5: Solve for x
    x = 43,718,606,200.07/338,741.71
  6. Step 6: Final answer
    x = 129,061.77

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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.