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Finding the Fourth Proportional to 139,718.66, 209,580.03 and 39,878.91

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Solution

The fourth proportional to 139,718.66, 209,580.03 and 39,878.91 is: 59,818.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,718.66 : 209,580.03 = 39,878.91 : x
  2. Step 2: Convert to fraction form
    139,718.66/209,580.03 = 39,878.91/x
  3. Step 3: Cross multiply
    139,718.66x = 209,580.03 × 39,878.91
  4. Step 4: Simplify right side
    139,718.66x = 8,357,823,154.17
  5. Step 5: Solve for x
    x = 8,357,823,154.17/139,718.66
  6. Step 6: Final answer
    x = 59,818.95

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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.