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Finding the Fourth Proportional to 64,709.70, 97,064.55 and 38,400.90

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Solution

The fourth proportional to 64,709.70, 97,064.55 and 38,400.90 is: 57,601.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,709.70 : 97,064.55 = 38,400.90 : x
  2. Step 2: Convert to fraction form
    64,709.70/97,064.55 = 38,400.90/x
  3. Step 3: Cross multiply
    64,709.70x = 97,064.55 × 38,400.90
  4. Step 4: Simplify right side
    64,709.70x = 3,727,366,078.10
  5. Step 5: Solve for x
    x = 3,727,366,078.10/64,709.70
  6. Step 6: Final answer
    x = 57,601.35

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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.