Home / 72,000.42-99,360.64-40,169.33

Finding the Fourth Proportional to 72,000.42, 99,360.64 and 40,169.33

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Solution

The fourth proportional to 72,000.42, 99,360.64 and 40,169.33 is: 55,433.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,000.42 : 99,360.64 = 40,169.33 : x
  2. Step 2: Convert to fraction form
    72,000.42/99,360.64 = 40,169.33/x
  3. Step 3: Cross multiply
    72,000.42x = 99,360.64 × 40,169.33
  4. Step 4: Simplify right side
    72,000.42x = 3,991,249,639.52
  5. Step 5: Solve for x
    x = 3,991,249,639.52/72,000.42
  6. Step 6: Final answer
    x = 55,433.70

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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.