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Finding the Fourth Proportional to 72,010.68, 99,364.80 and 40,173.40

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Solution

The fourth proportional to 72,010.68, 99,364.80 and 40,173.40 is: 55,433.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,010.68 : 99,364.80 = 40,173.40 : x
  2. Step 2: Convert to fraction form
    72,010.68/99,364.80 = 40,173.40/x
  3. Step 3: Cross multiply
    72,010.68x = 99,364.80 × 40,173.40
  4. Step 4: Simplify right side
    72,010.68x = 3,991,821,856.32
  5. Step 5: Solve for x
    x = 3,991,821,856.32/72,010.68
  6. Step 6: Final answer
    x = 55,433.75

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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.