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Finding the Fourth Proportional to 70,889.20, 97,831.56 and 39,058.08

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Solution

The fourth proportional to 70,889.20, 97,831.56 and 39,058.08 is: 53,902.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,889.20 : 97,831.56 = 39,058.08 : x
  2. Step 2: Convert to fraction form
    70,889.20/97,831.56 = 39,058.08/x
  3. Step 3: Cross multiply
    70,889.20x = 97,831.56 × 39,058.08
  4. Step 4: Simplify right side
    70,889.20x = 3,821,112,897.00
  5. Step 5: Solve for x
    x = 3,821,112,897.00/70,889.20
  6. Step 6: Final answer
    x = 53,902.61

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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.