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Finding the Fourth Proportional to 158,790.53, 219,130.00 and 86,194.87

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Solution

The fourth proportional to 158,790.53, 219,130.00 and 86,194.87 is: 118,948.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,790.53 : 219,130.00 = 86,194.87 : x
  2. Step 2: Convert to fraction form
    158,790.53/219,130.00 = 86,194.87/x
  3. Step 3: Cross multiply
    158,790.53x = 219,130.00 × 86,194.87
  4. Step 4: Simplify right side
    158,790.53x = 18,887,881,099.79
  5. Step 5: Solve for x
    x = 18,887,881,099.79/158,790.53
  6. Step 6: Final answer
    x = 118,948.41

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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.