Home / 72,129,139.16-99,540,619.26-39,534,174.68

Finding the Fourth Proportional to 72,129,139.16, 99,540,619.26 and 39,534,174.68

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Solution

The fourth proportional to 72,129,139.16, 99,540,619.26 and 39,534,174.68 is: 54,558,480.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,129,139.16 : 99,540,619.26 = 39,534,174.68 : x
  2. Step 2: Convert to fraction form
    72,129,139.16/99,540,619.26 = 39,534,174.68/x
  3. Step 3: Cross multiply
    72,129,139.16x = 99,540,619.26 × 39,534,174.68
  4. Step 4: Simplify right side
    72,129,139.16x = 3,935,256,229,580,212.50
  5. Step 5: Solve for x
    x = 3,935,256,229,580,212.50/72,129,139.16
  6. Step 6: Final answer
    x = 54,558,480.46

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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.