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Finding the Fourth Proportional to 79,745.40, 119,747.70 and 57,713.40

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Solution

The fourth proportional to 79,745.40, 119,747.70 and 57,713.40 is: 86,663.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,745.40 : 119,747.70 = 57,713.40 : x
  2. Step 2: Convert to fraction form
    79,745.40/119,747.70 = 57,713.40/x
  3. Step 3: Cross multiply
    79,745.40x = 119,747.70 × 57,713.40
  4. Step 4: Simplify right side
    79,745.40x = 6,911,046,909.18
  5. Step 5: Solve for x
    x = 6,911,046,909.18/79,745.40
  6. Step 6: Final answer
    x = 86,663.89

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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.