Home / 76,706.12-115,058.27-19,779.72

Finding the Fourth Proportional to 76,706.12, 115,058.27 and 19,779.72

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Solution

The fourth proportional to 76,706.12, 115,058.27 and 19,779.72 is: 29,669.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,706.12 : 115,058.27 = 19,779.72 : x
  2. Step 2: Convert to fraction form
    76,706.12/115,058.27 = 19,779.72/x
  3. Step 3: Cross multiply
    76,706.12x = 115,058.27 × 19,779.72
  4. Step 4: Simplify right side
    76,706.12x = 2,275,820,265.39
  5. Step 5: Solve for x
    x = 2,275,820,265.39/76,706.12
  6. Step 6: Final answer
    x = 29,669.35

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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.