Home / 137,649.36-190,037.56-86,705.76

Finding the Fourth Proportional to 137,649.36, 190,037.56 and 86,705.76

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Solution

The fourth proportional to 137,649.36, 190,037.56 and 86,705.76 is: 119,705.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,649.36 : 190,037.56 = 86,705.76 : x
  2. Step 2: Convert to fraction form
    137,649.36/190,037.56 = 86,705.76/x
  3. Step 3: Cross multiply
    137,649.36x = 190,037.56 × 86,705.76
  4. Step 4: Simplify right side
    137,649.36x = 16,477,351,726.80
  5. Step 5: Solve for x
    x = 16,477,351,726.80/137,649.36
  6. Step 6: Final answer
    x = 119,705.25

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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.