Home / 72,378.03-99,885.78-40,557.18

Finding the Fourth Proportional to 72,378.03, 99,885.78 and 40,557.18

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Solution

The fourth proportional to 72,378.03, 99,885.78 and 40,557.18 is: 55,971.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,378.03 : 99,885.78 = 40,557.18 : x
  2. Step 2: Convert to fraction form
    72,378.03/99,885.78 = 40,557.18/x
  3. Step 3: Cross multiply
    72,378.03x = 99,885.78 × 40,557.18
  4. Step 4: Simplify right side
    72,378.03x = 4,051,085,558.90
  5. Step 5: Solve for x
    x = 4,051,085,558.90/72,378.03
  6. Step 6: Final answer
    x = 55,971.21

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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.