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Finding the Fourth Proportional to 71,492.40, 98,653.02 and 39,661.20

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Solution

The fourth proportional to 71,492.40, 98,653.02 and 39,661.20 is: 54,728.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,492.40 : 98,653.02 = 39,661.20 : x
  2. Step 2: Convert to fraction form
    71,492.40/98,653.02 = 39,661.20/x
  3. Step 3: Cross multiply
    71,492.40x = 98,653.02 × 39,661.20
  4. Step 4: Simplify right side
    71,492.40x = 3,912,697,156.82
  5. Step 5: Solve for x
    x = 3,912,697,156.82/71,492.40
  6. Step 6: Final answer
    x = 54,728.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.