Home / 138,140.18-190,618.01-77,709.58

Finding the Fourth Proportional to 138,140.18, 190,618.01 and 77,709.58

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Solution

The fourth proportional to 138,140.18, 190,618.01 and 77,709.58 is: 107,230.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,140.18 : 190,618.01 = 77,709.58 : x
  2. Step 2: Convert to fraction form
    138,140.18/190,618.01 = 77,709.58/x
  3. Step 3: Cross multiply
    138,140.18x = 190,618.01 × 77,709.58
  4. Step 4: Simplify right side
    138,140.18x = 14,812,844,923.85
  5. Step 5: Solve for x
    x = 14,812,844,923.85/138,140.18
  6. Step 6: Final answer
    x = 107,230.53

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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.