Home / 138,729.40-208,055.70-55,631.80

Finding the Fourth Proportional to 138,729.40, 208,055.70 and 55,631.80

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Solution

The fourth proportional to 138,729.40, 208,055.70 and 55,631.80 is: 83,432.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,729.40 : 208,055.70 = 55,631.80 : x
  2. Step 2: Convert to fraction form
    138,729.40/208,055.70 = 55,631.80/x
  3. Step 3: Cross multiply
    138,729.40x = 208,055.70 × 55,631.80
  4. Step 4: Simplify right side
    138,729.40x = 11,574,513,091.26
  5. Step 5: Solve for x
    x = 11,574,513,091.26/138,729.40
  6. Step 6: Final answer
    x = 83,432.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.