Home / 138,127.60-190,615.04-78,511.60

Finding the Fourth Proportional to 138,127.60, 190,615.04 and 78,511.60

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Solution

The fourth proportional to 138,127.60, 190,615.04 and 78,511.60 is: 108,345.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,127.60 : 190,615.04 = 78,511.60 : x
  2. Step 2: Convert to fraction form
    138,127.60/190,615.04 = 78,511.60/x
  3. Step 3: Cross multiply
    138,127.60x = 190,615.04 × 78,511.60
  4. Step 4: Simplify right side
    138,127.60x = 14,965,491,774.46
  5. Step 5: Solve for x
    x = 14,965,491,774.46/138,127.60
  6. Step 6: Final answer
    x = 108,345.41

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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.