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Finding the Fourth Proportional to 72,300.88, 99,775.10 and 40,475.90

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Solution

The fourth proportional to 72,300.88, 99,775.10 and 40,475.90 is: 55,856.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,300.88 : 99,775.10 = 40,475.90 : x
  2. Step 2: Convert to fraction form
    72,300.88/99,775.10 = 40,475.90/x
  3. Step 3: Cross multiply
    72,300.88x = 99,775.10 × 40,475.90
  4. Step 4: Simplify right side
    72,300.88x = 4,038,486,970.09
  5. Step 5: Solve for x
    x = 4,038,486,970.09/72,300.88
  6. Step 6: Final answer
    x = 55,856.68

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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.