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Finding the Fourth Proportional to 90,699.71, 136,120.41 and 62,815.19

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Solution

The fourth proportional to 90,699.71, 136,120.41 and 62,815.19 is: 94,271.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,699.71 : 136,120.41 = 62,815.19 : x
  2. Step 2: Convert to fraction form
    90,699.71/136,120.41 = 62,815.19/x
  3. Step 3: Cross multiply
    90,699.71x = 136,120.41 × 62,815.19
  4. Step 4: Simplify right side
    90,699.71x = 8,550,429,417.03
  5. Step 5: Solve for x
    x = 8,550,429,417.03/90,699.71
  6. Step 6: Final answer
    x = 94,271.85

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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.