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Finding the Fourth Proportional to 72,029.70, 99,412.65 and 43,749.90

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Solution

The fourth proportional to 72,029.70, 99,412.65 and 43,749.90 is: 60,381.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,029.70 : 99,412.65 = 43,749.90 : x
  2. Step 2: Convert to fraction form
    72,029.70/99,412.65 = 43,749.90/x
  3. Step 3: Cross multiply
    72,029.70x = 99,412.65 × 43,749.90
  4. Step 4: Simplify right side
    72,029.70x = 4,349,293,496.24
  5. Step 5: Solve for x
    x = 4,349,293,496.24/72,029.70
  6. Step 6: Final answer
    x = 60,381.95

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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.