Home / 72,135.86-99,549.69-40,306.10

Finding the Fourth Proportional to 72,135.86, 99,549.69 and 40,306.10

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Solution

The fourth proportional to 72,135.86, 99,549.69 and 40,306.10 is: 55,623.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,135.86 : 99,549.69 = 40,306.10 : x
  2. Step 2: Convert to fraction form
    72,135.86/99,549.69 = 40,306.10/x
  3. Step 3: Cross multiply
    72,135.86x = 99,549.69 × 40,306.10
  4. Step 4: Simplify right side
    72,135.86x = 4,012,459,760.11
  5. Step 5: Solve for x
    x = 4,012,459,760.11/72,135.86
  6. Step 6: Final answer
    x = 55,623.65

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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.