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Finding the Fourth Proportional to 112,907.20, 169,360.80 and 70,916.80

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Solution

The fourth proportional to 112,907.20, 169,360.80 and 70,916.80 is: 106,375.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,907.20 : 169,360.80 = 70,916.80 : x
  2. Step 2: Convert to fraction form
    112,907.20/169,360.80 = 70,916.80/x
  3. Step 3: Cross multiply
    112,907.20x = 169,360.80 × 70,916.80
  4. Step 4: Simplify right side
    112,907.20x = 12,010,525,981.44
  5. Step 5: Solve for x
    x = 12,010,525,981.44/112,907.20
  6. Step 6: Final answer
    x = 106,375.20

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1.5x scale

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.