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Finding the Fourth Proportional to 216,878.70, 299,289.66 and 121,385.36

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Solution

The fourth proportional to 216,878.70, 299,289.66 and 121,385.36 is: 167,510.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,878.70 : 299,289.66 = 121,385.36 : x
  2. Step 2: Convert to fraction form
    216,878.70/299,289.66 = 121,385.36/x
  3. Step 3: Cross multiply
    216,878.70x = 299,289.66 × 121,385.36
  4. Step 4: Simplify right side
    216,878.70x = 36,329,383,123.38
  5. Step 5: Solve for x
    x = 36,329,383,123.38/216,878.70
  6. Step 6: Final answer
    x = 167,510.15

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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.