Home / 72,101.15-99,505.40-39,838.59

Finding the Fourth Proportional to 72,101.15, 99,505.40 and 39,838.59

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Solution

The fourth proportional to 72,101.15, 99,505.40 and 39,838.59 is: 54,980.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,101.15 : 99,505.40 = 39,838.59 : x
  2. Step 2: Convert to fraction form
    72,101.15/99,505.40 = 39,838.59/x
  3. Step 3: Cross multiply
    72,101.15x = 99,505.40 × 39,838.59
  4. Step 4: Simplify right side
    72,101.15x = 3,964,154,932.98
  5. Step 5: Solve for x
    x = 3,964,154,932.98/72,101.15
  6. Step 6: Final answer
    x = 54,980.47

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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.