Home / 285,386.45-428,045.63-75,040.79

Finding the Fourth Proportional to 285,386.45, 428,045.63 and 75,040.79

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Solution

The fourth proportional to 285,386.45, 428,045.63 and 75,040.79 is: 112,552.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,386.45 : 428,045.63 = 75,040.79 : x
  2. Step 2: Convert to fraction form
    285,386.45/428,045.63 = 75,040.79/x
  3. Step 3: Cross multiply
    285,386.45x = 428,045.63 × 75,040.79
  4. Step 4: Simplify right side
    285,386.45x = 32,120,879,715.82
  5. Step 5: Solve for x
    x = 32,120,879,715.82/285,386.45
  6. Step 6: Final answer
    x = 112,552.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.