Home / 138,025.74-190,483.02-76,778.40

Finding the Fourth Proportional to 138,025.74, 190,483.02 and 76,778.40

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Solution

The fourth proportional to 138,025.74, 190,483.02 and 76,778.40 is: 105,958.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,025.74 : 190,483.02 = 76,778.40 : x
  2. Step 2: Convert to fraction form
    138,025.74/190,483.02 = 76,778.40/x
  3. Step 3: Cross multiply
    138,025.74x = 190,483.02 × 76,778.40
  4. Step 4: Simplify right side
    138,025.74x = 14,624,981,502.77
  5. Step 5: Solve for x
    x = 14,624,981,502.77/138,025.74
  6. Step 6: Final answer
    x = 105,958.36

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1.5x scale

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.