Home / 138,941.85-191,737.23-78,511.19

Finding the Fourth Proportional to 138,941.85, 191,737.23 and 78,511.19

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Solution

The fourth proportional to 138,941.85, 191,737.23 and 78,511.19 is: 108,344.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,941.85 : 191,737.23 = 78,511.19 : x
  2. Step 2: Convert to fraction form
    138,941.85/191,737.23 = 78,511.19/x
  3. Step 3: Cross multiply
    138,941.85x = 191,737.23 × 78,511.19
  4. Step 4: Simplify right side
    138,941.85x = 15,053,518,094.60
  5. Step 5: Solve for x
    x = 15,053,518,094.60/138,941.85
  6. Step 6: Final answer
    x = 108,344.02

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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.