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Finding the Fourth Proportional to 72,153.87, 99,507.87 and 45,298.88

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Solution

The fourth proportional to 72,153.87, 99,507.87 and 45,298.88 is: 62,471.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,153.87 : 99,507.87 = 45,298.88 : x
  2. Step 2: Convert to fraction form
    72,153.87/99,507.87 = 45,298.88/x
  3. Step 3: Cross multiply
    72,153.87x = 99,507.87 × 45,298.88
  4. Step 4: Simplify right side
    72,153.87x = 4,507,595,062.19
  5. Step 5: Solve for x
    x = 4,507,595,062.19/72,153.87
  6. Step 6: Final answer
    x = 62,471.98

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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.