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Finding the Fourth Proportional to 64,998.90, 91,260.90 and 64,998.90

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Solution

The fourth proportional to 64,998.90, 91,260.90 and 64,998.90 is: 91,260.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,998.90 : 91,260.90 = 64,998.90 : x
  2. Step 2: Convert to fraction form
    64,998.90/91,260.90 = 64,998.90/x
  3. Step 3: Cross multiply
    64,998.90x = 91,260.90 × 64,998.90
  4. Step 4: Simplify right side
    64,998.90x = 5,931,858,113.01
  5. Step 5: Solve for x
    x = 5,931,858,113.01/64,998.90
  6. Step 6: Final answer
    x = 91,260.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.