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Finding the Fourth Proportional to 100,831.10, 151,246.65 and 87,007.10

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Solution

The fourth proportional to 100,831.10, 151,246.65 and 87,007.10 is: 130,510.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,831.10 : 151,246.65 = 87,007.10 : x
  2. Step 2: Convert to fraction form
    100,831.10/151,246.65 = 87,007.10/x
  3. Step 3: Cross multiply
    100,831.10x = 151,246.65 × 87,007.10
  4. Step 4: Simplify right side
    100,831.10x = 13,159,532,401.22
  5. Step 5: Solve for x
    x = 13,159,532,401.22/100,831.10
  6. Step 6: Final answer
    x = 130,510.65

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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.