Home / 138,124.70-190,610.16-77,695.35

Finding the Fourth Proportional to 138,124.70, 190,610.16 and 77,695.35

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Solution

The fourth proportional to 138,124.70, 190,610.16 and 77,695.35 is: 107,218.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,124.70 : 190,610.16 = 77,695.35 : x
  2. Step 2: Convert to fraction form
    138,124.70/190,610.16 = 77,695.35/x
  3. Step 3: Cross multiply
    138,124.70x = 190,610.16 × 77,695.35
  4. Step 4: Simplify right side
    138,124.70x = 14,809,521,753.23
  5. Step 5: Solve for x
    x = 14,809,521,753.23/138,124.70
  6. Step 6: Final answer
    x = 107,218.49

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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.