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Finding the Fourth Proportional to 173,889.90, 260,689.05 and 90,783.90

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Solution

The fourth proportional to 173,889.90, 260,689.05 and 90,783.90 is: 136,099.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,889.90 : 260,689.05 = 90,783.90 : x
  2. Step 2: Convert to fraction form
    173,889.90/260,689.05 = 90,783.90/x
  3. Step 3: Cross multiply
    173,889.90x = 260,689.05 × 90,783.90
  4. Step 4: Simplify right side
    173,889.90x = 23,666,368,646.30
  5. Step 5: Solve for x
    x = 23,666,368,646.30/173,889.90
  6. Step 6: Final answer
    x = 136,099.73

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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.