Home / 127,785.15-191,513.70-77,812.20

Finding the Fourth Proportional to 127,785.15, 191,513.70 and 77,812.20

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Solution

The fourth proportional to 127,785.15, 191,513.70 and 77,812.20 is: 116,618.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,785.15 : 191,513.70 = 77,812.20 : x
  2. Step 2: Convert to fraction form
    127,785.15/191,513.70 = 77,812.20/x
  3. Step 3: Cross multiply
    127,785.15x = 191,513.70 × 77,812.20
  4. Step 4: Simplify right side
    127,785.15x = 14,902,102,327.14
  5. Step 5: Solve for x
    x = 14,902,102,327.14/127,785.15
  6. Step 6: Final answer
    x = 116,618.42

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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.