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Finding the Fourth Proportional to 230,486.58, 318,048.21 and 128,502.45

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Solution

The fourth proportional to 230,486.58, 318,048.21 and 128,502.45 is: 177,320.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,486.58 : 318,048.21 = 128,502.45 : x
  2. Step 2: Convert to fraction form
    230,486.58/318,048.21 = 128,502.45/x
  3. Step 3: Cross multiply
    230,486.58x = 318,048.21 × 128,502.45
  4. Step 4: Simplify right side
    230,486.58x = 40,869,974,203.11
  5. Step 5: Solve for x
    x = 40,869,974,203.11/230,486.58
  6. Step 6: Final answer
    x = 177,320.41

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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.