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Finding the Fourth Proportional to 158,495.76, 218,738.04 and 86,889.60

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Solution

The fourth proportional to 158,495.76, 218,738.04 and 86,889.60 is: 119,915.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,495.76 : 218,738.04 = 86,889.60 : x
  2. Step 2: Convert to fraction form
    158,495.76/218,738.04 = 86,889.60/x
  3. Step 3: Cross multiply
    158,495.76x = 218,738.04 × 86,889.60
  4. Step 4: Simplify right side
    158,495.76x = 19,006,060,800.38
  5. Step 5: Solve for x
    x = 19,006,060,800.38/158,495.76
  6. Step 6: Final answer
    x = 119,915.26

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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.