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Finding the Fourth Proportional to 159,346.90, 219,900.18 and 87,728.50

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Solution

The fourth proportional to 159,346.90, 219,900.18 and 87,728.50 is: 121,066.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,346.90 : 219,900.18 = 87,728.50 : x
  2. Step 2: Convert to fraction form
    159,346.90/219,900.18 = 87,728.50/x
  3. Step 3: Cross multiply
    159,346.90x = 219,900.18 × 87,728.50
  4. Step 4: Simplify right side
    159,346.90x = 19,291,512,941.13
  5. Step 5: Solve for x
    x = 19,291,512,941.13/159,346.90
  6. Step 6: Final answer
    x = 121,066.13

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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.