Home / 100,088.04-138,171.47-57,638.37

Finding the Fourth Proportional to 100,088.04, 138,171.47 and 57,638.37

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Solution

The fourth proportional to 100,088.04, 138,171.47 and 57,638.37 is: 79,569.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,088.04 : 138,171.47 = 57,638.37 : x
  2. Step 2: Convert to fraction form
    100,088.04/138,171.47 = 57,638.37/x
  3. Step 3: Cross multiply
    100,088.04x = 138,171.47 × 57,638.37
  4. Step 4: Simplify right side
    100,088.04x = 7,963,978,311.30
  5. Step 5: Solve for x
    x = 7,963,978,311.30/100,088.04
  6. Step 6: Final answer
    x = 79,569.73

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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.