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Finding the Fourth Proportional to 217,389.84, 299,870.88 and 136,689.60

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Solution

The fourth proportional to 217,389.84, 299,870.88 and 136,689.60 is: 188,551.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,389.84 : 299,870.88 = 136,689.60 : x
  2. Step 2: Convert to fraction form
    217,389.84/299,870.88 = 136,689.60/x
  3. Step 3: Cross multiply
    217,389.84x = 299,870.88 × 136,689.60
  4. Step 4: Simplify right side
    217,389.84x = 40,989,230,638.85
  5. Step 5: Solve for x
    x = 40,989,230,638.85/217,389.84
  6. Step 6: Final answer
    x = 188,551.73

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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.