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Finding the Fourth Proportional to 153,058.56, 211,211.52 and 85,073.28

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Solution

The fourth proportional to 153,058.56, 211,211.52 and 85,073.28 is: 117,395.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,058.56 : 211,211.52 = 85,073.28 : x
  2. Step 2: Convert to fraction form
    153,058.56/211,211.52 = 85,073.28/x
  3. Step 3: Cross multiply
    153,058.56x = 211,211.52 × 85,073.28
  4. Step 4: Simplify right side
    153,058.56x = 17,968,456,780.19
  5. Step 5: Solve for x
    x = 17,968,456,780.19/153,058.56
  6. Step 6: Final answer
    x = 117,395.96

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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.