Home / 72,177.50-99,604.96-40,345.72

Finding the Fourth Proportional to 72,177.50, 99,604.96 and 40,345.72

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Solution

The fourth proportional to 72,177.50, 99,604.96 and 40,345.72 is: 55,677.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,177.50 : 99,604.96 = 40,345.72 : x
  2. Step 2: Convert to fraction form
    72,177.50/99,604.96 = 40,345.72/x
  3. Step 3: Cross multiply
    72,177.50x = 99,604.96 × 40,345.72
  4. Step 4: Simplify right side
    72,177.50x = 4,018,633,826.77
  5. Step 5: Solve for x
    x = 4,018,633,826.77/72,177.50
  6. Step 6: Final answer
    x = 55,677.10

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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.