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Finding the Fourth Proportional to 259,987, 389,931.18 and 126,733.24

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Solution

The fourth proportional to 259,987, 389,931.18 and 126,733.24 is: 190,075.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,987 : 389,931.18 = 126,733.24 : x
  2. Step 2: Convert to fraction form
    259,987/389,931.18 = 126,733.24/x
  3. Step 3: Cross multiply
    259,987x = 389,931.18 × 126,733.24
  4. Step 4: Simplify right side
    259,987x = 49,417,241,818.42
  5. Step 5: Solve for x
    x = 49,417,241,818.42/259,987
  6. Step 6: Final answer
    x = 190,075.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.