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Finding the Fourth Proportional to 142,976, 197,277.60 and 79,300.16

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Solution

The fourth proportional to 142,976, 197,277.60 and 79,300.16 is: 109,417.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,976 : 197,277.60 = 79,300.16 : x
  2. Step 2: Convert to fraction form
    142,976/197,277.60 = 79,300.16/x
  3. Step 3: Cross multiply
    142,976x = 197,277.60 × 79,300.16
  4. Step 4: Simplify right side
    142,976x = 15,644,145,244.42
  5. Step 5: Solve for x
    x = 15,644,145,244.42/142,976
  6. Step 6: Final answer
    x = 109,417.98

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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.