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Finding the Fourth Proportional to 153,391.16, 211,611.48 and 89,700.86

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Solution

The fourth proportional to 153,391.16, 211,611.48 and 89,700.86 is: 123,747.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,391.16 : 211,611.48 = 89,700.86 : x
  2. Step 2: Convert to fraction form
    153,391.16/211,611.48 = 89,700.86/x
  3. Step 3: Cross multiply
    153,391.16x = 211,611.48 × 89,700.86
  4. Step 4: Simplify right side
    153,391.16x = 18,981,731,741.87
  5. Step 5: Solve for x
    x = 18,981,731,741.87/153,391.16
  6. Step 6: Final answer
    x = 123,747.23

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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.