Home / 142,101.73-196,089.01-78,430.87

Finding the Fourth Proportional to 142,101.73, 196,089.01 and 78,430.87

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Solution

The fourth proportional to 142,101.73, 196,089.01 and 78,430.87 is: 108,228.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,101.73 : 196,089.01 = 78,430.87 : x
  2. Step 2: Convert to fraction form
    142,101.73/196,089.01 = 78,430.87/x
  3. Step 3: Cross multiply
    142,101.73x = 196,089.01 × 78,430.87
  4. Step 4: Simplify right side
    142,101.73x = 15,379,431,651.74
  5. Step 5: Solve for x
    x = 15,379,431,651.74/142,101.73
  6. Step 6: Final answer
    x = 108,228.32

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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.