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Finding the Fourth Proportional to 71,492.51, 98,671.49 and 39,671.66

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Solution

The fourth proportional to 71,492.51, 98,671.49 and 39,671.66 is: 54,753.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,492.51 : 98,671.49 = 39,671.66 : x
  2. Step 2: Convert to fraction form
    71,492.51/98,671.49 = 39,671.66/x
  3. Step 3: Cross multiply
    71,492.51x = 98,671.49 × 39,671.66
  4. Step 4: Simplify right side
    71,492.51x = 3,914,461,111.26
  5. Step 5: Solve for x
    x = 3,914,461,111.26/71,492.51
  6. Step 6: Final answer
    x = 54,753.45

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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.