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Finding the Fourth Proportional to 153,153.91, 211,321.42 and 89,479.41

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Solution

The fourth proportional to 153,153.91, 211,321.42 and 89,479.41 is: 123,463.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,153.91 : 211,321.42 = 89,479.41 : x
  2. Step 2: Convert to fraction form
    153,153.91/211,321.42 = 89,479.41/x
  3. Step 3: Cross multiply
    153,153.91x = 211,321.42 × 89,479.41
  4. Step 4: Simplify right side
    153,153.91x = 18,908,915,981.96
  5. Step 5: Solve for x
    x = 18,908,915,981.96/153,153.91
  6. Step 6: Final answer
    x = 123,463.49

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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.