Home / 138,124.54-190,557.88-77,681.32

Finding the Fourth Proportional to 138,124.54, 190,557.88 and 77,681.32

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Solution

The fourth proportional to 138,124.54, 190,557.88 and 77,681.32 is: 107,169.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,124.54 : 190,557.88 = 77,681.32 : x
  2. Step 2: Convert to fraction form
    138,124.54/190,557.88 = 77,681.32/x
  3. Step 3: Cross multiply
    138,124.54x = 190,557.88 × 77,681.32
  4. Step 4: Simplify right side
    138,124.54x = 14,802,787,654.80
  5. Step 5: Solve for x
    x = 14,802,787,654.80/138,124.54
  6. Step 6: Final answer
    x = 107,169.86

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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.