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Finding the Fourth Proportional to 72,160.02, 99,581.49 and 39,894.17

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Solution

The fourth proportional to 72,160.02, 99,581.49 and 39,894.17 is: 55,054.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,160.02 : 99,581.49 = 39,894.17 : x
  2. Step 2: Convert to fraction form
    72,160.02/99,581.49 = 39,894.17/x
  3. Step 3: Cross multiply
    72,160.02x = 99,581.49 × 39,894.17
  4. Step 4: Simplify right side
    72,160.02x = 3,972,720,393.01
  5. Step 5: Solve for x
    x = 3,972,720,393.01/72,160.02
  6. Step 6: Final answer
    x = 55,054.31

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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.