Home / 72,119.16-99,512.28-40,288.32

Finding the Fourth Proportional to 72,119.16, 99,512.28 and 40,288.32

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Solution

The fourth proportional to 72,119.16, 99,512.28 and 40,288.32 is: 55,591.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,119.16 : 99,512.28 = 40,288.32 : x
  2. Step 2: Convert to fraction form
    72,119.16/99,512.28 = 40,288.32/x
  3. Step 3: Cross multiply
    72,119.16x = 99,512.28 × 40,288.32
  4. Step 4: Simplify right side
    72,119.16x = 4,009,182,580.57
  5. Step 5: Solve for x
    x = 4,009,182,580.57/72,119.16
  6. Step 6: Final answer
    x = 55,591.09

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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.