Home / 129,106.15-193,300.05-65,789.77

Finding the Fourth Proportional to 129,106.15, 193,300.05 and 65,789.77

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Solution

The fourth proportional to 129,106.15, 193,300.05 and 65,789.77 is: 98,501.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,106.15 : 193,300.05 = 65,789.77 : x
  2. Step 2: Convert to fraction form
    129,106.15/193,300.05 = 65,789.77/x
  3. Step 3: Cross multiply
    129,106.15x = 193,300.05 × 65,789.77
  4. Step 4: Simplify right side
    129,106.15x = 12,717,165,830.49
  5. Step 5: Solve for x
    x = 12,717,165,830.49/129,106.15
  6. Step 6: Final answer
    x = 98,501.63

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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.