Home / 129,038.90-193,558.35-81,799.70

Finding the Fourth Proportional to 129,038.90, 193,558.35 and 81,799.70

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Solution

The fourth proportional to 129,038.90, 193,558.35 and 81,799.70 is: 122,699.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,038.90 : 193,558.35 = 81,799.70 : x
  2. Step 2: Convert to fraction form
    129,038.90/193,558.35 = 81,799.70/x
  3. Step 3: Cross multiply
    129,038.90x = 193,558.35 × 81,799.70
  4. Step 4: Simplify right side
    129,038.90x = 15,833,014,962.50
  5. Step 5: Solve for x
    x = 15,833,014,962.50/129,038.90
  6. Step 6: Final answer
    x = 122,699.55

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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.