Home / 142,137.51-196,144.60-77,605.56

Finding the Fourth Proportional to 142,137.51, 196,144.60 and 77,605.56

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Solution

The fourth proportional to 142,137.51, 196,144.60 and 77,605.56 is: 107,092.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,137.51 : 196,144.60 = 77,605.56 : x
  2. Step 2: Convert to fraction form
    142,137.51/196,144.60 = 77,605.56/x
  3. Step 3: Cross multiply
    142,137.51x = 196,144.60 × 77,605.56
  4. Step 4: Simplify right side
    142,137.51x = 15,221,911,523.98
  5. Step 5: Solve for x
    x = 15,221,911,523.98/142,137.51
  6. Step 6: Final answer
    x = 107,092.85

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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.