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Finding the Fourth Proportional to 72,009.99, 99,373.08 and 39,746.34

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Solution

The fourth proportional to 72,009.99, 99,373.08 and 39,746.34 is: 54,849.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,009.99 : 99,373.08 = 39,746.34 : x
  2. Step 2: Convert to fraction form
    72,009.99/99,373.08 = 39,746.34/x
  3. Step 3: Cross multiply
    72,009.99x = 99,373.08 × 39,746.34
  4. Step 4: Simplify right side
    72,009.99x = 3,949,716,224.53
  5. Step 5: Solve for x
    x = 3,949,716,224.53/72,009.99
  6. Step 6: Final answer
    x = 54,849.56

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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.