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Finding the Fourth Proportional to 98,690.94, 136,182.87 and 58,406.40

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Solution

The fourth proportional to 98,690.94, 136,182.87 and 58,406.40 is: 80,594.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,690.94 : 136,182.87 = 58,406.40 : x
  2. Step 2: Convert to fraction form
    98,690.94/136,182.87 = 58,406.40/x
  3. Step 3: Cross multiply
    98,690.94x = 136,182.87 × 58,406.40
  4. Step 4: Simplify right side
    98,690.94x = 7,953,951,178.37
  5. Step 5: Solve for x
    x = 7,953,951,178.37/98,690.94
  6. Step 6: Final answer
    x = 80,594.54

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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.