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Finding the Fourth Proportional to 139,718.61, 209,513.61 and 44,931.24

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Solution

The fourth proportional to 139,718.61, 209,513.61 and 44,931.24 is: 67,376.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,718.61 : 209,513.61 = 44,931.24 : x
  2. Step 2: Convert to fraction form
    139,718.61/209,513.61 = 44,931.24/x
  3. Step 3: Cross multiply
    139,718.61x = 209,513.61 × 44,931.24
  4. Step 4: Simplify right side
    139,718.61x = 9,413,706,294.18
  5. Step 5: Solve for x
    x = 9,413,706,294.18/139,718.61
  6. Step 6: Final answer
    x = 67,376.18

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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.