Home / 86,056.20-129,039.75-38,630.45

Finding the Fourth Proportional to 86,056.20, 129,039.75 and 38,630.45

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Solution

The fourth proportional to 86,056.20, 129,039.75 and 38,630.45 is: 57,925.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,056.20 : 129,039.75 = 38,630.45 : x
  2. Step 2: Convert to fraction form
    86,056.20/129,039.75 = 38,630.45/x
  3. Step 3: Cross multiply
    86,056.20x = 129,039.75 × 38,630.45
  4. Step 4: Simplify right side
    86,056.20x = 4,984,863,610.39
  5. Step 5: Solve for x
    x = 4,984,863,610.39/86,056.20
  6. Step 6: Final answer
    x = 57,925.68

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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.