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Finding the Fourth Proportional to 72,153.96, 99,508 and 45,298.98

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Solution

The fourth proportional to 72,153.96, 99,508 and 45,298.98 is: 62,472.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,153.96 : 99,508 = 45,298.98 : x
  2. Step 2: Convert to fraction form
    72,153.96/99,508 = 45,298.98/x
  3. Step 3: Cross multiply
    72,153.96x = 99,508 × 45,298.98
  4. Step 4: Simplify right side
    72,153.96x = 4,507,610,901.84
  5. Step 5: Solve for x
    x = 4,507,610,901.84/72,153.96
  6. Step 6: Final answer
    x = 62,472.12

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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.