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Finding the Fourth Proportional to 65,807.64, 90,856.08 and 45,658.08

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Solution

The fourth proportional to 65,807.64, 90,856.08 and 45,658.08 is: 63,036.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,807.64 : 90,856.08 = 45,658.08 : x
  2. Step 2: Convert to fraction form
    65,807.64/90,856.08 = 45,658.08/x
  3. Step 3: Cross multiply
    65,807.64x = 90,856.08 × 45,658.08
  4. Step 4: Simplify right side
    65,807.64x = 4,148,314,169.13
  5. Step 5: Solve for x
    x = 4,148,314,169.13/65,807.64
  6. Step 6: Final answer
    x = 63,036.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.