Home / 72,188.08-99,618.60-40,356.64

Finding the Fourth Proportional to 72,188.08, 99,618.60 and 40,356.64

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Solution

The fourth proportional to 72,188.08, 99,618.60 and 40,356.64 is: 55,691.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,188.08 : 99,618.60 = 40,356.64 : x
  2. Step 2: Convert to fraction form
    72,188.08/99,618.60 = 40,356.64/x
  3. Step 3: Cross multiply
    72,188.08x = 99,618.60 × 40,356.64
  4. Step 4: Simplify right side
    72,188.08x = 4,020,271,977.50
  5. Step 5: Solve for x
    x = 4,020,271,977.50/72,188.08
  6. Step 6: Final answer
    x = 55,691.63

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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.