Home / 137,972.21-190,417.42-76,724.50

Finding the Fourth Proportional to 137,972.21, 190,417.42 and 76,724.50

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Solution

The fourth proportional to 137,972.21, 190,417.42 and 76,724.50 is: 105,888.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,972.21 : 190,417.42 = 76,724.50 : x
  2. Step 2: Convert to fraction form
    137,972.21/190,417.42 = 76,724.50/x
  3. Step 3: Cross multiply
    137,972.21x = 190,417.42 × 76,724.50
  4. Step 4: Simplify right side
    137,972.21x = 14,609,680,808.13
  5. Step 5: Solve for x
    x = 14,609,680,808.13/137,972.21
  6. Step 6: Final answer
    x = 105,888.58

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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.