Home / 100,084.40-138,116.39-54,762.68

Finding the Fourth Proportional to 100,084.40, 138,116.39 and 54,762.68

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Solution

The fourth proportional to 100,084.40, 138,116.39 and 54,762.68 is: 75,572.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,084.40 : 138,116.39 = 54,762.68 : x
  2. Step 2: Convert to fraction form
    100,084.40/138,116.39 = 54,762.68/x
  3. Step 3: Cross multiply
    100,084.40x = 138,116.39 × 54,762.68
  4. Step 4: Simplify right side
    100,084.40x = 7,563,623,114.65
  5. Step 5: Solve for x
    x = 7,563,623,114.65/100,084.40
  6. Step 6: Final answer
    x = 75,572.45

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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.