Home / 138,025.42-190,461.92-80,678.16

Finding the Fourth Proportional to 138,025.42, 190,461.92 and 80,678.16

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Solution

The fourth proportional to 138,025.42, 190,461.92 and 80,678.16 is: 111,328.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,025.42 : 190,461.92 = 80,678.16 : x
  2. Step 2: Convert to fraction form
    138,025.42/190,461.92 = 80,678.16/x
  3. Step 3: Cross multiply
    138,025.42x = 190,461.92 × 80,678.16
  4. Step 4: Simplify right side
    138,025.42x = 15,366,116,852.28
  5. Step 5: Solve for x
    x = 15,366,116,852.28/138,025.42
  6. Step 6: Final answer
    x = 111,328.17

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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.