Home / 105,528.07-145,632.39-57,781.74

Finding the Fourth Proportional to 105,528.07, 145,632.39 and 57,781.74

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Solution

The fourth proportional to 105,528.07, 145,632.39 and 57,781.74 is: 79,740.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,528.07 : 145,632.39 = 57,781.74 : x
  2. Step 2: Convert to fraction form
    105,528.07/145,632.39 = 57,781.74/x
  3. Step 3: Cross multiply
    105,528.07x = 145,632.39 × 57,781.74
  4. Step 4: Simplify right side
    105,528.07x = 8,414,892,894.56
  5. Step 5: Solve for x
    x = 8,414,892,894.56/105,528.07
  6. Step 6: Final answer
    x = 79,740.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.