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Finding the Fourth Proportional to 72,363.47, 99,858.69 and 40,530.74

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Solution

The fourth proportional to 72,363.47, 99,858.69 and 40,530.74 is: 55,930.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,363.47 : 99,858.69 = 40,530.74 : x
  2. Step 2: Convert to fraction form
    72,363.47/99,858.69 = 40,530.74/x
  3. Step 3: Cross multiply
    72,363.47x = 99,858.69 × 40,530.74
  4. Step 4: Simplify right side
    72,363.47x = 4,047,346,101.84
  5. Step 5: Solve for x
    x = 4,047,346,101.84/72,363.47
  6. Step 6: Final answer
    x = 55,930.79

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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.