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Finding the Fourth Proportional to 153,897.03, 212,388.62 and 85,927.37

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Solution

The fourth proportional to 153,897.03, 212,388.62 and 85,927.37 is: 118,585.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,897.03 : 212,388.62 = 85,927.37 : x
  2. Step 2: Convert to fraction form
    153,897.03/212,388.62 = 85,927.37/x
  3. Step 3: Cross multiply
    153,897.03x = 212,388.62 × 85,927.37
  4. Step 4: Simplify right side
    153,897.03x = 18,249,994,042.95
  5. Step 5: Solve for x
    x = 18,249,994,042.95/153,897.03
  6. Step 6: Final answer
    x = 118,585.75

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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.