Home / 120,528.78-166,312.20-66,813.76

Finding the Fourth Proportional to 120,528.78, 166,312.20 and 66,813.76

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Solution

The fourth proportional to 120,528.78, 166,312.20 and 66,813.76 is: 92,193.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,528.78 : 166,312.20 = 66,813.76 : x
  2. Step 2: Convert to fraction form
    120,528.78/166,312.20 = 66,813.76/x
  3. Step 3: Cross multiply
    120,528.78x = 166,312.20 × 66,813.76
  4. Step 4: Simplify right side
    120,528.78x = 11,111,943,415.87
  5. Step 5: Solve for x
    x = 11,111,943,415.87/120,528.78
  6. Step 6: Final answer
    x = 92,193.28

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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.