Home / 138,399.12-190,994.76-77,970.42

Finding the Fourth Proportional to 138,399.12, 190,994.76 and 77,970.42

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Solution

The fourth proportional to 138,399.12, 190,994.76 and 77,970.42 is: 107,601.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,399.12 : 190,994.76 = 77,970.42 : x
  2. Step 2: Convert to fraction form
    138,399.12/190,994.76 = 77,970.42/x
  3. Step 3: Cross multiply
    138,399.12x = 190,994.76 × 77,970.42
  4. Step 4: Simplify right side
    138,399.12x = 14,891,941,655.00
  5. Step 5: Solve for x
    x = 14,891,941,655.00/138,399.12
  6. Step 6: Final answer
    x = 107,601.42

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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.