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Finding the Fourth Proportional to 71,461.60, 98,623.07 and 39,640.75

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Solution

The fourth proportional to 71,461.60, 98,623.07 and 39,640.75 is: 54,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,461.60 : 98,623.07 = 39,640.75 : x
  2. Step 2: Convert to fraction form
    71,461.60/98,623.07 = 39,640.75/x
  3. Step 3: Cross multiply
    71,461.60x = 98,623.07 × 39,640.75
  4. Step 4: Simplify right side
    71,461.60x = 3,909,492,462.10
  5. Step 5: Solve for x
    x = 3,909,492,462.10/71,461.60
  6. Step 6: Final answer
    x = 54,707.60

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1.5x scale

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.