Home / 99,995.76-137,989.08-55,275.12

Finding the Fourth Proportional to 99,995.76, 137,989.08 and 55,275.12

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Solution

The fourth proportional to 99,995.76, 137,989.08 and 55,275.12 is: 76,276.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,995.76 : 137,989.08 = 55,275.12 : x
  2. Step 2: Convert to fraction form
    99,995.76/137,989.08 = 55,275.12/x
  3. Step 3: Cross multiply
    99,995.76x = 137,989.08 × 55,275.12
  4. Step 4: Simplify right side
    99,995.76x = 7,627,362,955.69
  5. Step 5: Solve for x
    x = 7,627,362,955.69/99,995.76
  6. Step 6: Final answer
    x = 76,276.86

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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.