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Finding the Fourth Proportional to 72,288.67, 99,758.35 and 40,457.57

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Solution

The fourth proportional to 72,288.67, 99,758.35 and 40,457.57 is: 55,831.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,288.67 : 99,758.35 = 40,457.57 : x
  2. Step 2: Convert to fraction form
    72,288.67/99,758.35 = 40,457.57/x
  3. Step 3: Cross multiply
    72,288.67x = 99,758.35 × 40,457.57
  4. Step 4: Simplify right side
    72,288.67x = 4,035,979,929.42
  5. Step 5: Solve for x
    x = 4,035,979,929.42/72,288.67
  6. Step 6: Final answer
    x = 55,831.43

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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.