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Finding the Fourth Proportional to 88,831.70, 133,320.45 and 85,915.70

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Solution

The fourth proportional to 88,831.70, 133,320.45 and 85,915.70 is: 128,944.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,831.70 : 133,320.45 = 85,915.70 : x
  2. Step 2: Convert to fraction form
    88,831.70/133,320.45 = 85,915.70/x
  3. Step 3: Cross multiply
    88,831.70x = 133,320.45 × 85,915.70
  4. Step 4: Simplify right side
    88,831.70x = 11,454,319,786.07
  5. Step 5: Solve for x
    x = 11,454,319,786.07/88,831.70
  6. Step 6: Final answer
    x = 128,944.06

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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.