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Finding the Fourth Proportional to 191,586.58, 287,379.69 and 90,361.02

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Solution

The fourth proportional to 191,586.58, 287,379.69 and 90,361.02 is: 135,541.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,586.58 : 287,379.69 = 90,361.02 : x
  2. Step 2: Convert to fraction form
    191,586.58/287,379.69 = 90,361.02/x
  3. Step 3: Cross multiply
    191,586.58x = 287,379.69 × 90,361.02
  4. Step 4: Simplify right side
    191,586.58x = 25,967,921,915.68
  5. Step 5: Solve for x
    x = 25,967,921,915.68/191,586.58
  6. Step 6: Final answer
    x = 135,541.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.