Home / 100,267.19-138,368.73-55,555.19

Finding the Fourth Proportional to 100,267.19, 138,368.73 and 55,555.19

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Solution

The fourth proportional to 100,267.19, 138,368.73 and 55,555.19 is: 76,666.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,267.19 : 138,368.73 = 55,555.19 : x
  2. Step 2: Convert to fraction form
    100,267.19/138,368.73 = 55,555.19/x
  3. Step 3: Cross multiply
    100,267.19x = 138,368.73 × 55,555.19
  4. Step 4: Simplify right side
    100,267.19x = 7,687,100,807.43
  5. Step 5: Solve for x
    x = 7,687,100,807.43/100,267.19
  6. Step 6: Final answer
    x = 76,666.16

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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.