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Finding the Fourth Proportional to 153,235.80, 211,461.36 and 85,249.32

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Solution

The fourth proportional to 153,235.80, 211,461.36 and 85,249.32 is: 117,641.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,235.80 : 211,461.36 = 85,249.32 : x
  2. Step 2: Convert to fraction form
    153,235.80/211,461.36 = 85,249.32/x
  3. Step 3: Cross multiply
    153,235.80x = 211,461.36 × 85,249.32
  4. Step 4: Simplify right side
    153,235.80x = 18,026,937,146.28
  5. Step 5: Solve for x
    x = 18,026,937,146.28/153,235.80
  6. Step 6: Final answer
    x = 117,641.81

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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.