Home / 72,002.87-99,368.73-40,172.45

Finding the Fourth Proportional to 72,002.87, 99,368.73 and 40,172.45

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Solution

The fourth proportional to 72,002.87, 99,368.73 and 40,172.45 is: 55,440.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,002.87 : 99,368.73 = 40,172.45 : x
  2. Step 2: Convert to fraction form
    72,002.87/99,368.73 = 40,172.45/x
  3. Step 3: Cross multiply
    72,002.87x = 99,368.73 × 40,172.45
  4. Step 4: Simplify right side
    72,002.87x = 3,991,884,840.64
  5. Step 5: Solve for x
    x = 3,991,884,840.64/72,002.87
  6. Step 6: Final answer
    x = 55,440.64

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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.