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Finding the Fourth Proportional to 142,237.88, 196,271.54 and 78,571.88

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Solution

The fourth proportional to 142,237.88, 196,271.54 and 78,571.88 is: 108,419.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,237.88 : 196,271.54 = 78,571.88 : x
  2. Step 2: Convert to fraction form
    142,237.88/196,271.54 = 78,571.88/x
  3. Step 3: Cross multiply
    142,237.88x = 196,271.54 × 78,571.88
  4. Step 4: Simplify right side
    142,237.88x = 15,421,422,514.08
  5. Step 5: Solve for x
    x = 15,421,422,514.08/142,237.88
  6. Step 6: Final answer
    x = 108,419.94

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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.