Home / 115,345.72-159,087.54-72,888.76

Finding the Fourth Proportional to 115,345.72, 159,087.54 and 72,888.76

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Solution

The fourth proportional to 115,345.72, 159,087.54 and 72,888.76 is: 100,529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,345.72 : 159,087.54 = 72,888.76 : x
  2. Step 2: Convert to fraction form
    115,345.72/159,087.54 = 72,888.76/x
  3. Step 3: Cross multiply
    115,345.72x = 159,087.54 × 72,888.76
  4. Step 4: Simplify right side
    115,345.72x = 11,595,693,522.05
  5. Step 5: Solve for x
    x = 11,595,693,522.05/115,345.72
  6. Step 6: Final answer
    x = 100,529.90

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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.