Home / 100,386.79-138,534.27-55,068.95

Finding the Fourth Proportional to 100,386.79, 138,534.27 and 55,068.95

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Solution

The fourth proportional to 100,386.79, 138,534.27 and 55,068.95 is: 75,995.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,386.79 : 138,534.27 = 55,068.95 : x
  2. Step 2: Convert to fraction form
    100,386.79/138,534.27 = 55,068.95/x
  3. Step 3: Cross multiply
    100,386.79x = 138,534.27 × 55,068.95
  4. Step 4: Simplify right side
    100,386.79x = 7,628,937,134.25
  5. Step 5: Solve for x
    x = 7,628,937,134.25/100,386.79
  6. Step 6: Final answer
    x = 75,995.43

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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.