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Finding the Fourth Proportional to 247,911, 371,718.60 and 98,172.78

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Solution

The fourth proportional to 247,911, 371,718.60 and 98,172.78 is: 147,200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,911 : 371,718.60 = 98,172.78 : x
  2. Step 2: Convert to fraction form
    247,911/371,718.60 = 98,172.78/x
  3. Step 3: Cross multiply
    247,911x = 371,718.60 × 98,172.78
  4. Step 4: Simplify right side
    247,911x = 36,492,648,339.71
  5. Step 5: Solve for x
    x = 36,492,648,339.71/247,911
  6. Step 6: Final answer
    x = 147,200.60

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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.