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Finding the Fourth Proportional to 64,986.30, 91,177.65 and 64,986.30

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Solution

The fourth proportional to 64,986.30, 91,177.65 and 64,986.30 is: 91,177.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,986.30 : 91,177.65 = 64,986.30 : x
  2. Step 2: Convert to fraction form
    64,986.30/91,177.65 = 64,986.30/x
  3. Step 3: Cross multiply
    64,986.30x = 91,177.65 × 64,986.30
  4. Step 4: Simplify right side
    64,986.30x = 5,925,298,116.20
  5. Step 5: Solve for x
    x = 5,925,298,116.20/64,986.30
  6. Step 6: Final answer
    x = 91,177.65

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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.