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Finding the Fourth Proportional to 142,897.55, 197,207.33 and 79,235.33

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Solution

The fourth proportional to 142,897.55, 197,207.33 and 79,235.33 is: 109,349.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,897.55 : 197,207.33 = 79,235.33 : x
  2. Step 2: Convert to fraction form
    142,897.55/197,207.33 = 79,235.33/x
  3. Step 3: Cross multiply
    142,897.55x = 197,207.33 × 79,235.33
  4. Step 4: Simplify right side
    142,897.55x = 15,625,786,488.76
  5. Step 5: Solve for x
    x = 15,625,786,488.76/142,897.55
  6. Step 6: Final answer
    x = 109,349.58

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1.5x scale

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.