Home / 72,220.55-99,664.28-40,389.45

Finding the Fourth Proportional to 72,220.55, 99,664.28 and 40,389.45

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Solution

The fourth proportional to 72,220.55, 99,664.28 and 40,389.45 is: 55,737.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,220.55 : 99,664.28 = 40,389.45 : x
  2. Step 2: Convert to fraction form
    72,220.55/99,664.28 = 40,389.45/x
  3. Step 3: Cross multiply
    72,220.55x = 99,664.28 × 40,389.45
  4. Step 4: Simplify right side
    72,220.55x = 4,025,385,473.68
  5. Step 5: Solve for x
    x = 4,025,385,473.68/72,220.55
  6. Step 6: Final answer
    x = 55,737.40

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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.