Home / 138,022.92-190,478.39-77,612.58

Finding the Fourth Proportional to 138,022.92, 190,478.39 and 77,612.58

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Solution

The fourth proportional to 138,022.92, 190,478.39 and 77,612.58 is: 107,109.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,022.92 : 190,478.39 = 77,612.58 : x
  2. Step 2: Convert to fraction form
    138,022.92/190,478.39 = 77,612.58/x
  3. Step 3: Cross multiply
    138,022.92x = 190,478.39 × 77,612.58
  4. Step 4: Simplify right side
    138,022.92x = 14,783,518,894.08
  5. Step 5: Solve for x
    x = 14,783,518,894.08/138,022.92
  6. Step 6: Final answer
    x = 107,109.16

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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.