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Finding the Fourth Proportional to 137,875.79, 190,341.16 and 92,790.79

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Solution

The fourth proportional to 137,875.79, 190,341.16 and 92,790.79 is: 128,100.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,875.79 : 190,341.16 = 92,790.79 : x
  2. Step 2: Convert to fraction form
    137,875.79/190,341.16 = 92,790.79/x
  3. Step 3: Cross multiply
    137,875.79x = 190,341.16 × 92,790.79
  4. Step 4: Simplify right side
    137,875.79x = 17,661,905,898.09
  5. Step 5: Solve for x
    x = 17,661,905,898.09/137,875.79
  6. Step 6: Final answer
    x = 128,100.12

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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.