Home / 72,178.77-99,606.83-40,347.64

Finding the Fourth Proportional to 72,178.77, 99,606.83 and 40,347.64

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Solution

The fourth proportional to 72,178.77, 99,606.83 and 40,347.64 is: 55,679.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,178.77 : 99,606.83 = 40,347.64 : x
  2. Step 2: Convert to fraction form
    72,178.77/99,606.83 = 40,347.64/x
  3. Step 3: Cross multiply
    72,178.77x = 99,606.83 × 40,347.64
  4. Step 4: Simplify right side
    72,178.77x = 4,018,900,518.38
  5. Step 5: Solve for x
    x = 4,018,900,518.38/72,178.77
  6. Step 6: Final answer
    x = 55,679.81

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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.