Home / 72,130.89-99,538.79-40,299.99

Finding the Fourth Proportional to 72,130.89, 99,538.79 and 40,299.99

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Solution

The fourth proportional to 72,130.89, 99,538.79 and 40,299.99 is: 55,612.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,130.89 : 99,538.79 = 40,299.99 : x
  2. Step 2: Convert to fraction form
    72,130.89/99,538.79 = 40,299.99/x
  3. Step 3: Cross multiply
    72,130.89x = 99,538.79 × 40,299.99
  4. Step 4: Simplify right side
    72,130.89x = 4,011,412,040.11
  5. Step 5: Solve for x
    x = 4,011,412,040.11/72,130.89
  6. Step 6: Final answer
    x = 55,612.96

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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.