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Finding the Fourth Proportional to 265,521.15, 398,134.13 and 87,931.31

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Solution

The fourth proportional to 265,521.15, 398,134.13 and 87,931.31 is: 131,848.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,521.15 : 398,134.13 = 87,931.31 : x
  2. Step 2: Convert to fraction form
    265,521.15/398,134.13 = 87,931.31/x
  3. Step 3: Cross multiply
    265,521.15x = 398,134.13 × 87,931.31
  4. Step 4: Simplify right side
    265,521.15x = 35,008,453,176.28
  5. Step 5: Solve for x
    x = 35,008,453,176.28/265,521.15
  6. Step 6: Final answer
    x = 131,848.08

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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.