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Finding the Fourth Proportional to 158,509.40, 218,741.58 and 86,889.20

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Solution

The fourth proportional to 158,509.40, 218,741.58 and 86,889.20 is: 119,906.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,509.40 : 218,741.58 = 86,889.20 : x
  2. Step 2: Convert to fraction form
    158,509.40/218,741.58 = 86,889.20/x
  3. Step 3: Cross multiply
    158,509.40x = 218,741.58 × 86,889.20
  4. Step 4: Simplify right side
    158,509.40x = 19,006,280,892.94
  5. Step 5: Solve for x
    x = 19,006,280,892.94/158,509.40
  6. Step 6: Final answer
    x = 119,906.33

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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.