Home / 137,139.20-189,432.80-105,253.28

Finding the Fourth Proportional to 137,139.20, 189,432.80 and 105,253.28

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Solution

The fourth proportional to 137,139.20, 189,432.80 and 105,253.28 is: 145,388.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,139.20 : 189,432.80 = 105,253.28 : x
  2. Step 2: Convert to fraction form
    137,139.20/189,432.80 = 105,253.28/x
  3. Step 3: Cross multiply
    137,139.20x = 189,432.80 × 105,253.28
  4. Step 4: Simplify right side
    137,139.20x = 19,938,423,539.58
  5. Step 5: Solve for x
    x = 19,938,423,539.58/137,139.20
  6. Step 6: Final answer
    x = 145,388.22

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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.