Home / 72,036.81-99,420.20-40,212.31

Finding the Fourth Proportional to 72,036.81, 99,420.20 and 40,212.31

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Solution

The fourth proportional to 72,036.81, 99,420.20 and 40,212.31 is: 55,498.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,036.81 : 99,420.20 = 40,212.31 : x
  2. Step 2: Convert to fraction form
    72,036.81/99,420.20 = 40,212.31/x
  3. Step 3: Cross multiply
    72,036.81x = 99,420.20 × 40,212.31
  4. Step 4: Simplify right side
    72,036.81x = 3,997,915,902.66
  5. Step 5: Solve for x
    x = 3,997,915,902.66/72,036.81
  6. Step 6: Final answer
    x = 55,498.24

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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.