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Finding the Fourth Proportional to 100,788.81, 139,088.58 and 55,466.78

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Solution

The fourth proportional to 100,788.81, 139,088.58 and 55,466.78 is: 76,544.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,788.81 : 139,088.58 = 55,466.78 : x
  2. Step 2: Convert to fraction form
    100,788.81/139,088.58 = 55,466.78/x
  3. Step 3: Cross multiply
    100,788.81x = 139,088.58 × 55,466.78
  4. Step 4: Simplify right side
    100,788.81x = 7,714,794,763.93
  5. Step 5: Solve for x
    x = 7,714,794,763.93/100,788.81
  6. Step 6: Final answer
    x = 76,544.16

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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.