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Finding the Fourth Proportional to 72,172.80, 99,599.04 and 40,343.04

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Solution

The fourth proportional to 72,172.80, 99,599.04 and 40,343.04 is: 55,673.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,172.80 : 99,599.04 = 40,343.04 : x
  2. Step 2: Convert to fraction form
    72,172.80/99,599.04 = 40,343.04/x
  3. Step 3: Cross multiply
    72,172.80x = 99,599.04 × 40,343.04
  4. Step 4: Simplify right side
    72,172.80x = 4,018,128,054.68
  5. Step 5: Solve for x
    x = 4,018,128,054.68/72,172.80
  6. Step 6: Final answer
    x = 55,673.72

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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.