Home / 138,287,281.20-190,836,056.28-76,407,178.92

Finding the Fourth Proportional to 138,287,281.20, 190,836,056.28 and 76,407,178.92

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Solution

The fourth proportional to 138,287,281.20, 190,836,056.28 and 76,407,178.92 is: 105,441,690.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,287,281.20 : 190,836,056.28 = 76,407,178.92 : x
  2. Step 2: Convert to fraction form
    138,287,281.20/190,836,056.28 = 76,407,178.92/x
  3. Step 3: Cross multiply
    138,287,281.20x = 190,836,056.28 × 76,407,178.92
  4. Step 4: Simplify right side
    138,287,281.20x = 14,581,244,696,573,150
  5. Step 5: Solve for x
    x = 14,581,244,696,573,150/138,287,281.20
  6. Step 6: Final answer
    x = 105,441,690.44

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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.