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Finding the Fourth Proportional to 173,451.22, 239,436.47 and 105,490

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Solution

The fourth proportional to 173,451.22, 239,436.47 and 105,490 is: 145,621.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,451.22 : 239,436.47 = 105,490 : x
  2. Step 2: Convert to fraction form
    173,451.22/239,436.47 = 105,490/x
  3. Step 3: Cross multiply
    173,451.22x = 239,436.47 × 105,490
  4. Step 4: Simplify right side
    173,451.22x = 25,258,153,220.30
  5. Step 5: Solve for x
    x = 25,258,153,220.30/173,451.22
  6. Step 6: Final answer
    x = 145,621.08

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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.