Home / 72,188.18-99,619.91-40,357.08

Finding the Fourth Proportional to 72,188.18, 99,619.91 and 40,357.08

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Solution

The fourth proportional to 72,188.18, 99,619.91 and 40,357.08 is: 55,692.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,188.18 : 99,619.91 = 40,357.08 : x
  2. Step 2: Convert to fraction form
    72,188.18/99,619.91 = 40,357.08/x
  3. Step 3: Cross multiply
    72,188.18x = 99,619.91 × 40,357.08
  4. Step 4: Simplify right side
    72,188.18x = 4,020,368,778.36
  5. Step 5: Solve for x
    x = 4,020,368,778.36/72,188.18
  6. Step 6: Final answer
    x = 55,692.89

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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.