Home / 100,669.77-138,921.35-55,347.71

Finding the Fourth Proportional to 100,669.77, 138,921.35 and 55,347.71

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Solution

The fourth proportional to 100,669.77, 138,921.35 and 55,347.71 is: 76,378.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,669.77 : 138,921.35 = 55,347.71 : x
  2. Step 2: Convert to fraction form
    100,669.77/138,921.35 = 55,347.71/x
  3. Step 3: Cross multiply
    100,669.77x = 138,921.35 × 55,347.71
  4. Step 4: Simplify right side
    100,669.77x = 7,688,977,621.26
  5. Step 5: Solve for x
    x = 7,688,977,621.26/100,669.77
  6. Step 6: Final answer
    x = 76,378.22

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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.