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Finding the Fourth Proportional to 216,878.61, 299,292.44 and 121,385.30

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Solution

The fourth proportional to 216,878.61, 299,292.44 and 121,385.30 is: 167,511.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,878.61 : 299,292.44 = 121,385.30 : x
  2. Step 2: Convert to fraction form
    216,878.61/299,292.44 = 121,385.30/x
  3. Step 3: Cross multiply
    216,878.61x = 299,292.44 × 121,385.30
  4. Step 4: Simplify right side
    216,878.61x = 36,329,703,668.83
  5. Step 5: Solve for x
    x = 36,329,703,668.83/216,878.61
  6. Step 6: Final answer
    x = 167,511.70

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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.