Home / 72,305.16-99,780.08-40,036.70

Finding the Fourth Proportional to 72,305.16, 99,780.08 and 40,036.70

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Solution

The fourth proportional to 72,305.16, 99,780.08 and 40,036.70 is: 55,250.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,305.16 : 99,780.08 = 40,036.70 : x
  2. Step 2: Convert to fraction form
    72,305.16/99,780.08 = 40,036.70/x
  3. Step 3: Cross multiply
    72,305.16x = 99,780.08 × 40,036.70
  4. Step 4: Simplify right side
    72,305.16x = 3,994,865,128.94
  5. Step 5: Solve for x
    x = 3,994,865,128.94/72,305.16
  6. Step 6: Final answer
    x = 55,250.07

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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.