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Finding the Fourth Proportional to 98,915.40, 148,344.30 and 54,563.40

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Solution

The fourth proportional to 98,915.40, 148,344.30 and 54,563.40 is: 81,829.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,915.40 : 148,344.30 = 54,563.40 : x
  2. Step 2: Convert to fraction form
    98,915.40/148,344.30 = 54,563.40/x
  3. Step 3: Cross multiply
    98,915.40x = 148,344.30 × 54,563.40
  4. Step 4: Simplify right side
    98,915.40x = 8,094,169,378.62
  5. Step 5: Solve for x
    x = 8,094,169,378.62/98,915.40
  6. Step 6: Final answer
    x = 81,829.21

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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.