Home / 83,840.10-115,602.55-66,831.16

Finding the Fourth Proportional to 83,840.10, 115,602.55 and 66,831.16

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Solution

The fourth proportional to 83,840.10, 115,602.55 and 66,831.16 is: 92,149.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,840.10 : 115,602.55 = 66,831.16 : x
  2. Step 2: Convert to fraction form
    83,840.10/115,602.55 = 66,831.16/x
  3. Step 3: Cross multiply
    83,840.10x = 115,602.55 × 66,831.16
  4. Step 4: Simplify right side
    83,840.10x = 7,725,852,515.46
  5. Step 5: Solve for x
    x = 7,725,852,515.46/83,840.10
  6. Step 6: Final answer
    x = 92,149.85

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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.