Home / 129,119.16-193,262.10-66,703.80

Finding the Fourth Proportional to 129,119.16, 193,262.10 and 66,703.80

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Solution

The fourth proportional to 129,119.16, 193,262.10 and 66,703.80 is: 99,840.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,119.16 : 193,262.10 = 66,703.80 : x
  2. Step 2: Convert to fraction form
    129,119.16/193,262.10 = 66,703.80/x
  3. Step 3: Cross multiply
    129,119.16x = 193,262.10 × 66,703.80
  4. Step 4: Simplify right side
    129,119.16x = 12,891,316,465.98
  5. Step 5: Solve for x
    x = 12,891,316,465.98/129,119.16
  6. Step 6: Final answer
    x = 99,840.46

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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.