Home / 72,439.80-99,966.60-40,608.66

Finding the Fourth Proportional to 72,439.80, 99,966.60 and 40,608.66

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Solution

The fourth proportional to 72,439.80, 99,966.60 and 40,608.66 is: 56,039.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,439.80 : 99,966.60 = 40,608.66 : x
  2. Step 2: Convert to fraction form
    72,439.80/99,966.60 = 40,608.66/x
  3. Step 3: Cross multiply
    72,439.80x = 99,966.60 × 40,608.66
  4. Step 4: Simplify right side
    72,439.80x = 4,059,509,670.76
  5. Step 5: Solve for x
    x = 4,059,509,670.76/72,439.80
  6. Step 6: Final answer
    x = 56,039.77

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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.