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Finding the Fourth Proportional to 100,880.95, 139,211.22 and 57,829.57

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Solution

The fourth proportional to 100,880.95, 139,211.22 and 57,829.57 is: 79,802.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,880.95 : 139,211.22 = 57,829.57 : x
  2. Step 2: Convert to fraction form
    100,880.95/139,211.22 = 57,829.57/x
  3. Step 3: Cross multiply
    100,880.95x = 139,211.22 × 57,829.57
  4. Step 4: Simplify right side
    100,880.95x = 8,050,525,595.47
  5. Step 5: Solve for x
    x = 8,050,525,595.47/100,880.95
  6. Step 6: Final answer
    x = 79,802.24

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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.