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Finding the Fourth Proportional to 153,373.86, 211,640.85 and 89,699.22

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Solution

The fourth proportional to 153,373.86, 211,640.85 and 89,699.22 is: 123,776.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,373.86 : 211,640.85 = 89,699.22 : x
  2. Step 2: Convert to fraction form
    153,373.86/211,640.85 = 89,699.22/x
  3. Step 3: Cross multiply
    153,373.86x = 211,640.85 × 89,699.22
  4. Step 4: Simplify right side
    153,373.86x = 18,984,019,165.14
  5. Step 5: Solve for x
    x = 18,984,019,165.14/153,373.86
  6. Step 6: Final answer
    x = 123,776.11

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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.