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Finding the Fourth Proportional to 76,609.80, 114,701.40 and 39,088.80

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Solution

The fourth proportional to 76,609.80, 114,701.40 and 39,088.80 is: 58,524.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,609.80 : 114,701.40 = 39,088.80 : x
  2. Step 2: Convert to fraction form
    76,609.80/114,701.40 = 39,088.80/x
  3. Step 3: Cross multiply
    76,609.80x = 114,701.40 × 39,088.80
  4. Step 4: Simplify right side
    76,609.80x = 4,483,540,084.32
  5. Step 5: Solve for x
    x = 4,483,540,084.32/76,609.80
  6. Step 6: Final answer
    x = 58,524.37

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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.