Home / 117,509.31-162,188.43-72,211.05

Finding the Fourth Proportional to 117,509.31, 162,188.43 and 72,211.05

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Solution

The fourth proportional to 117,509.31, 162,188.43 and 72,211.05 is: 99,666.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,509.31 : 162,188.43 = 72,211.05 : x
  2. Step 2: Convert to fraction form
    117,509.31/162,188.43 = 72,211.05/x
  3. Step 3: Cross multiply
    117,509.31x = 162,188.43 × 72,211.05
  4. Step 4: Simplify right side
    117,509.31x = 11,711,796,828.15
  5. Step 5: Solve for x
    x = 11,711,796,828.15/117,509.31
  6. Step 6: Final answer
    x = 99,666.97

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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.