Home / 72,688.50-109,032.75-19,380.66

Finding the Fourth Proportional to 72,688.50, 109,032.75 and 19,380.66

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Solution

The fourth proportional to 72,688.50, 109,032.75 and 19,380.66 is: 29,070.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,688.50 : 109,032.75 = 19,380.66 : x
  2. Step 2: Convert to fraction form
    72,688.50/109,032.75 = 19,380.66/x
  3. Step 3: Cross multiply
    72,688.50x = 109,032.75 × 19,380.66
  4. Step 4: Simplify right side
    72,688.50x = 2,113,126,656.62
  5. Step 5: Solve for x
    x = 2,113,126,656.62/72,688.50
  6. Step 6: Final answer
    x = 29,070.99

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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.