Home / 265,904.19-398,856.07-78,915.69

Finding the Fourth Proportional to 265,904.19, 398,856.07 and 78,915.69

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Solution

The fourth proportional to 265,904.19, 398,856.07 and 78,915.69 is: 118,373.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,904.19 : 398,856.07 = 78,915.69 : x
  2. Step 2: Convert to fraction form
    265,904.19/398,856.07 = 78,915.69/x
  3. Step 3: Cross multiply
    265,904.19x = 398,856.07 × 78,915.69
  4. Step 4: Simplify right side
    265,904.19x = 31,476,001,974.74
  5. Step 5: Solve for x
    x = 31,476,001,974.74/265,904.19
  6. Step 6: Final answer
    x = 118,373.47

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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.