Home / 128,200.22-191,812.35-77,412.31

Finding the Fourth Proportional to 128,200.22, 191,812.35 and 77,412.31

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Solution

The fourth proportional to 128,200.22, 191,812.35 and 77,412.31 is: 115,823.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,200.22 : 191,812.35 = 77,412.31 : x
  2. Step 2: Convert to fraction form
    128,200.22/191,812.35 = 77,412.31/x
  3. Step 3: Cross multiply
    128,200.22x = 191,812.35 × 77,412.31
  4. Step 4: Simplify right side
    128,200.22x = 14,848,636,910.79
  5. Step 5: Solve for x
    x = 14,848,636,910.79/128,200.22
  6. Step 6: Final answer
    x = 115,823.80

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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.