Home / 100,127.50-138,176.36-55,415.50

Finding the Fourth Proportional to 100,127.50, 138,176.36 and 55,415.50

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Solution

The fourth proportional to 100,127.50, 138,176.36 and 55,415.50 is: 76,473.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,127.50 : 138,176.36 = 55,415.50 : x
  2. Step 2: Convert to fraction form
    100,127.50/138,176.36 = 55,415.50/x
  3. Step 3: Cross multiply
    100,127.50x = 138,176.36 × 55,415.50
  4. Step 4: Simplify right side
    100,127.50x = 7,657,112,077.58
  5. Step 5: Solve for x
    x = 7,657,112,077.58/100,127.50
  6. Step 6: Final answer
    x = 76,473.62

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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.