Home / 83,640.07-115,390.45-47,810.86

Finding the Fourth Proportional to 83,640.07, 115,390.45 and 47,810.86

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Solution

The fourth proportional to 83,640.07, 115,390.45 and 47,810.86 is: 65,960.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,640.07 : 115,390.45 = 47,810.86 : x
  2. Step 2: Convert to fraction form
    83,640.07/115,390.45 = 47,810.86/x
  3. Step 3: Cross multiply
    83,640.07x = 115,390.45 × 47,810.86
  4. Step 4: Simplify right side
    83,640.07x = 5,516,916,287.11
  5. Step 5: Solve for x
    x = 5,516,916,287.11/83,640.07
  6. Step 6: Final answer
    x = 65,960.21

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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.