Home / 138,782.04-191,520.18-75,119.98

Finding the Fourth Proportional to 138,782.04, 191,520.18 and 75,119.98

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Solution

The fourth proportional to 138,782.04, 191,520.18 and 75,119.98 is: 103,666.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,782.04 : 191,520.18 = 75,119.98 : x
  2. Step 2: Convert to fraction form
    138,782.04/191,520.18 = 75,119.98/x
  3. Step 3: Cross multiply
    138,782.04x = 191,520.18 × 75,119.98
  4. Step 4: Simplify right side
    138,782.04x = 14,386,992,091.20
  5. Step 5: Solve for x
    x = 14,386,992,091.20/138,782.04
  6. Step 6: Final answer
    x = 103,666.09

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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.