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Finding the Fourth Proportional to 128,809.93, 193,247.60 and 40,064.10

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Solution

The fourth proportional to 128,809.93, 193,247.60 and 40,064.10 is: 60,106.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,809.93 : 193,247.60 = 40,064.10 : x
  2. Step 2: Convert to fraction form
    128,809.93/193,247.60 = 40,064.10/x
  3. Step 3: Cross multiply
    128,809.93x = 193,247.60 × 40,064.10
  4. Step 4: Simplify right side
    128,809.93x = 7,742,291,171.16
  5. Step 5: Solve for x
    x = 7,742,291,171.16/128,809.93
  6. Step 6: Final answer
    x = 60,106.32

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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.