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Finding the Fourth Proportional to 153,877.03, 212,349.49 and 85,890.07

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Solution

The fourth proportional to 153,877.03, 212,349.49 and 85,890.07 is: 118,527.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,877.03 : 212,349.49 = 85,890.07 : x
  2. Step 2: Convert to fraction form
    153,877.03/212,349.49 = 85,890.07/x
  3. Step 3: Cross multiply
    153,877.03x = 212,349.49 × 85,890.07
  4. Step 4: Simplify right side
    153,877.03x = 18,238,712,560.56
  5. Step 5: Solve for x
    x = 18,238,712,560.56/153,877.03
  6. Step 6: Final answer
    x = 118,527.84

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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.