Home / 137,877.12-190,270.32-78,261.12

Finding the Fourth Proportional to 137,877.12, 190,270.32 and 78,261.12

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Solution

The fourth proportional to 137,877.12, 190,270.32 and 78,261.12 is: 108,000.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,877.12 : 190,270.32 = 78,261.12 : x
  2. Step 2: Convert to fraction form
    137,877.12/190,270.32 = 78,261.12/x
  3. Step 3: Cross multiply
    137,877.12x = 190,270.32 × 78,261.12
  4. Step 4: Simplify right side
    137,877.12x = 14,890,768,345.96
  5. Step 5: Solve for x
    x = 14,890,768,345.96/137,877.12
  6. Step 6: Final answer
    x = 108,000.29

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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.