Home / 72,985.18-100,681.30-63,403.56

Finding the Fourth Proportional to 72,985.18, 100,681.30 and 63,403.56

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Solution

The fourth proportional to 72,985.18, 100,681.30 and 63,403.56 is: 87,463.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,985.18 : 100,681.30 = 63,403.56 : x
  2. Step 2: Convert to fraction form
    72,985.18/100,681.30 = 63,403.56/x
  3. Step 3: Cross multiply
    72,985.18x = 100,681.30 × 63,403.56
  4. Step 4: Simplify right side
    72,985.18x = 6,383,552,845.43
  5. Step 5: Solve for x
    x = 6,383,552,845.43/72,985.18
  6. Step 6: Final answer
    x = 87,463.69

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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.