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Finding the Fourth Proportional to 72,220.31, 99,689.08 and 49,634.07

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Solution

The fourth proportional to 72,220.31, 99,689.08 and 49,634.07 is: 68,512.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,220.31 : 99,689.08 = 49,634.07 : x
  2. Step 2: Convert to fraction form
    72,220.31/99,689.08 = 49,634.07/x
  3. Step 3: Cross multiply
    72,220.31x = 99,689.08 × 49,634.07
  4. Step 4: Simplify right side
    72,220.31x = 4,947,974,028.34
  5. Step 5: Solve for x
    x = 4,947,974,028.34/72,220.31
  6. Step 6: Final answer
    x = 68,512.23

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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.