Home / 230,457.05-318,031.99-128,488.87

Finding the Fourth Proportional to 230,457.05, 318,031.99 and 128,488.87

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Solution

The fourth proportional to 230,457.05, 318,031.99 and 128,488.87 is: 177,315.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,457.05 : 318,031.99 = 128,488.87 : x
  2. Step 2: Convert to fraction form
    230,457.05/318,031.99 = 128,488.87/x
  3. Step 3: Cross multiply
    230,457.05x = 318,031.99 × 128,488.87
  4. Step 4: Simplify right side
    230,457.05x = 40,863,571,018.95
  5. Step 5: Solve for x
    x = 40,863,571,018.95/230,457.05
  6. Step 6: Final answer
    x = 177,315.34

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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.