Home / 72,521.10-100,078.83-40,690.11

Finding the Fourth Proportional to 72,521.10, 100,078.83 and 40,690.11

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Solution

The fourth proportional to 72,521.10, 100,078.83 and 40,690.11 is: 56,152.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,521.10 : 100,078.83 = 40,690.11 : x
  2. Step 2: Convert to fraction form
    72,521.10/100,078.83 = 40,690.11/x
  3. Step 3: Cross multiply
    72,521.10x = 100,078.83 × 40,690.11
  4. Step 4: Simplify right side
    72,521.10x = 4,072,218,601.37
  5. Step 5: Solve for x
    x = 4,072,218,601.37/72,521.10
  6. Step 6: Final answer
    x = 56,152.19

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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.