Home / 100,643.36-138,886.29-55,320.37

Finding the Fourth Proportional to 100,643.36, 138,886.29 and 55,320.37

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Solution

The fourth proportional to 100,643.36, 138,886.29 and 55,320.37 is: 76,341.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,643.36 : 138,886.29 = 55,320.37 : x
  2. Step 2: Convert to fraction form
    100,643.36/138,886.29 = 55,320.37/x
  3. Step 3: Cross multiply
    100,643.36x = 138,886.29 × 55,320.37
  4. Step 4: Simplify right side
    100,643.36x = 7,683,241,210.12
  5. Step 5: Solve for x
    x = 7,683,241,210.12/100,643.36
  6. Step 6: Final answer
    x = 76,341.26

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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.