Home / 91,315.17-136,985.76-28,140.48

Finding the Fourth Proportional to 91,315.17, 136,985.76 and 28,140.48

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Solution

The fourth proportional to 91,315.17, 136,985.76 and 28,140.48 is: 42,214.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,315.17 : 136,985.76 = 28,140.48 : x
  2. Step 2: Convert to fraction form
    91,315.17/136,985.76 = 28,140.48/x
  3. Step 3: Cross multiply
    91,315.17x = 136,985.76 × 28,140.48
  4. Step 4: Simplify right side
    91,315.17x = 3,854,845,039.56
  5. Step 5: Solve for x
    x = 3,854,845,039.56/91,315.17
  6. Step 6: Final answer
    x = 42,214.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.