Home / 138,893.10-208,339.65-45,408.30

Finding the Fourth Proportional to 138,893.10, 208,339.65 and 45,408.30

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Solution

The fourth proportional to 138,893.10, 208,339.65 and 45,408.30 is: 68,112.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,893.10 : 208,339.65 = 45,408.30 : x
  2. Step 2: Convert to fraction form
    138,893.10/208,339.65 = 45,408.30/x
  3. Step 3: Cross multiply
    138,893.10x = 208,339.65 × 45,408.30
  4. Step 4: Simplify right side
    138,893.10x = 9,460,349,329.10
  5. Step 5: Solve for x
    x = 9,460,349,329.10/138,893.10
  6. Step 6: Final answer
    x = 68,112.45

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1.5x scale

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.