Home / 138,280.69-190,845.53-77,863.11

Finding the Fourth Proportional to 138,280.69, 190,845.53 and 77,863.11

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Solution

The fourth proportional to 138,280.69, 190,845.53 and 77,863.11 is: 107,461.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,280.69 : 190,845.53 = 77,863.11 : x
  2. Step 2: Convert to fraction form
    138,280.69/190,845.53 = 77,863.11/x
  3. Step 3: Cross multiply
    138,280.69x = 190,845.53 × 77,863.11
  4. Step 4: Simplify right side
    138,280.69x = 14,859,825,682.40
  5. Step 5: Solve for x
    x = 14,859,825,682.40/138,280.69
  6. Step 6: Final answer
    x = 107,461.32

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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.