Home / 138,357.18-190,933.65-77,928.69

Finding the Fourth Proportional to 138,357.18, 190,933.65 and 77,928.69

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Solution

The fourth proportional to 138,357.18, 190,933.65 and 77,928.69 is: 107,542.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,357.18 : 190,933.65 = 77,928.69 : x
  2. Step 2: Convert to fraction form
    138,357.18/190,933.65 = 77,928.69/x
  3. Step 3: Cross multiply
    138,357.18x = 190,933.65 × 77,928.69
  4. Step 4: Simplify right side
    138,357.18x = 14,879,209,221.42
  5. Step 5: Solve for x
    x = 14,879,209,221.42/138,357.18
  6. Step 6: Final answer
    x = 107,542.01

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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.