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Finding the Fourth Proportional to 265,509.90, 398,117.25 and 87,920.06

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Solution

The fourth proportional to 265,509.90, 398,117.25 and 87,920.06 is: 131,831.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,509.90 : 398,117.25 = 87,920.06 : x
  2. Step 2: Convert to fraction form
    265,509.90/398,117.25 = 87,920.06/x
  3. Step 3: Cross multiply
    265,509.90x = 398,117.25 × 87,920.06
  4. Step 4: Simplify right side
    265,509.90x = 35,002,490,516.45
  5. Step 5: Solve for x
    x = 35,002,490,516.45/265,509.90
  6. Step 6: Final answer
    x = 131,831.21

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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.