Home / 142,830.82-197,108.51-78,306.12

Finding the Fourth Proportional to 142,830.82, 197,108.51 and 78,306.12

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Solution

The fourth proportional to 142,830.82, 197,108.51 and 78,306.12 is: 108,063.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,830.82 : 197,108.51 = 78,306.12 : x
  2. Step 2: Convert to fraction form
    142,830.82/197,108.51 = 78,306.12/x
  3. Step 3: Cross multiply
    142,830.82x = 197,108.51 × 78,306.12
  4. Step 4: Simplify right side
    142,830.82x = 15,434,802,637.08
  5. Step 5: Solve for x
    x = 15,434,802,637.08/142,830.82
  6. Step 6: Final answer
    x = 108,063.53

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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.