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Finding the Fourth Proportional to 159,000.60, 219,420.09 and 91,017.20

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Solution

The fourth proportional to 159,000.60, 219,420.09 and 91,017.20 is: 125,603.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,000.60 : 219,420.09 = 91,017.20 : x
  2. Step 2: Convert to fraction form
    159,000.60/219,420.09 = 91,017.20/x
  3. Step 3: Cross multiply
    159,000.60x = 219,420.09 × 91,017.20
  4. Step 4: Simplify right side
    159,000.60x = 19,971,001,118.45
  5. Step 5: Solve for x
    x = 19,971,001,118.45/159,000.60
  6. Step 6: Final answer
    x = 125,603.31

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1.5x scale

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.