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Finding the Fourth Proportional to 97,768.80, 146,831.40 and 85,521.60

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Solution

The fourth proportional to 97,768.80, 146,831.40 and 85,521.60 is: 128,438.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,768.80 : 146,831.40 = 85,521.60 : x
  2. Step 2: Convert to fraction form
    97,768.80/146,831.40 = 85,521.60/x
  3. Step 3: Cross multiply
    97,768.80x = 146,831.40 × 85,521.60
  4. Step 4: Simplify right side
    97,768.80x = 12,557,256,258.24
  5. Step 5: Solve for x
    x = 12,557,256,258.24/97,768.80
  6. Step 6: Final answer
    x = 128,438.28

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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.