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Finding the Fourth Proportional to 72,362.82, 99,909.45 and 45,180.33

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Solution

The fourth proportional to 72,362.82, 99,909.45 and 45,180.33 is: 62,379.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,362.82 : 99,909.45 = 45,180.33 : x
  2. Step 2: Convert to fraction form
    72,362.82/99,909.45 = 45,180.33/x
  3. Step 3: Cross multiply
    72,362.82x = 99,909.45 × 45,180.33
  4. Step 4: Simplify right side
    72,362.82x = 4,513,941,921.12
  5. Step 5: Solve for x
    x = 4,513,941,921.12/72,362.82
  6. Step 6: Final answer
    x = 62,379.30

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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.