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Finding the Fourth Proportional to 90,477.90, 135,846.45 and 51,111.90

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Solution

The fourth proportional to 90,477.90, 135,846.45 and 51,111.90 is: 76,741.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,477.90 : 135,846.45 = 51,111.90 : x
  2. Step 2: Convert to fraction form
    90,477.90/135,846.45 = 51,111.90/x
  3. Step 3: Cross multiply
    90,477.90x = 135,846.45 × 51,111.90
  4. Step 4: Simplify right side
    90,477.90x = 6,943,370,167.76
  5. Step 5: Solve for x
    x = 6,943,370,167.76/90,477.90
  6. Step 6: Final answer
    x = 76,741.06

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1.5x scale

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.