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Finding the Fourth Proportional to 216,859.50, 299,450.79 and 136,421.64

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Solution

The fourth proportional to 216,859.50, 299,450.79 and 136,421.64 is: 188,378.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,859.50 : 299,450.79 = 136,421.64 : x
  2. Step 2: Convert to fraction form
    216,859.50/299,450.79 = 136,421.64/x
  3. Step 3: Cross multiply
    216,859.50x = 299,450.79 × 136,421.64
  4. Step 4: Simplify right side
    216,859.50x = 40,851,567,871.10
  5. Step 5: Solve for x
    x = 40,851,567,871.10/216,859.50
  6. Step 6: Final answer
    x = 188,378.04

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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.