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Finding the Fourth Proportional to 136,070.64, 187,807.94 and 75,662.48

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Solution

The fourth proportional to 136,070.64, 187,807.94 and 75,662.48 is: 104,431.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,070.64 : 187,807.94 = 75,662.48 : x
  2. Step 2: Convert to fraction form
    136,070.64/187,807.94 = 75,662.48/x
  3. Step 3: Cross multiply
    136,070.64x = 187,807.94 × 75,662.48
  4. Step 4: Simplify right side
    136,070.64x = 14,210,014,504.09
  5. Step 5: Solve for x
    x = 14,210,014,504.09/136,070.64
  6. Step 6: Final answer
    x = 104,431.16

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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.