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Finding the Fourth Proportional to 76,779.40, 105,952.74 and 43,238.92

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Solution

The fourth proportional to 76,779.40, 105,952.74 and 43,238.92 is: 59,668.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,779.40 : 105,952.74 = 43,238.92 : x
  2. Step 2: Convert to fraction form
    76,779.40/105,952.74 = 43,238.92/x
  3. Step 3: Cross multiply
    76,779.40x = 105,952.74 × 43,238.92
  4. Step 4: Simplify right side
    76,779.40x = 4,581,282,048.64
  5. Step 5: Solve for x
    x = 4,581,282,048.64/76,779.40
  6. Step 6: Final answer
    x = 59,668.11

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1.5x scale

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.