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Finding the Fourth Proportional to 90,734.74, 136,129.80 and 46,392.64

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Solution

The fourth proportional to 90,734.74, 136,129.80 and 46,392.64 is: 69,603.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,734.74 : 136,129.80 = 46,392.64 : x
  2. Step 2: Convert to fraction form
    90,734.74/136,129.80 = 46,392.64/x
  3. Step 3: Cross multiply
    90,734.74x = 136,129.80 × 46,392.64
  4. Step 4: Simplify right side
    90,734.74x = 6,315,420,804.67
  5. Step 5: Solve for x
    x = 6,315,420,804.67/90,734.74
  6. Step 6: Final answer
    x = 69,603.12

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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.