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Finding the Fourth Proportional to 230,762.45, 318,468.17 and 128,807.79

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Solution

The fourth proportional to 230,762.45, 318,468.17 and 128,807.79 is: 177,763.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,762.45 : 318,468.17 = 128,807.79 : x
  2. Step 2: Convert to fraction form
    230,762.45/318,468.17 = 128,807.79/x
  3. Step 3: Cross multiply
    230,762.45x = 318,468.17 × 128,807.79
  4. Step 4: Simplify right side
    230,762.45x = 41,021,180,290.81
  5. Step 5: Solve for x
    x = 41,021,180,290.81/230,762.45
  6. Step 6: Final answer
    x = 177,763.67

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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.