Home / 112,769.40-168,686.63-85,912.19

Finding the Fourth Proportional to 112,769.40, 168,686.63 and 85,912.19

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Solution

The fourth proportional to 112,769.40, 168,686.63 and 85,912.19 is: 128,512.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,769.40 : 168,686.63 = 85,912.19 : x
  2. Step 2: Convert to fraction form
    112,769.40/168,686.63 = 85,912.19/x
  3. Step 3: Cross multiply
    112,769.40x = 168,686.63 × 85,912.19
  4. Step 4: Simplify right side
    112,769.40x = 14,492,237,488.77
  5. Step 5: Solve for x
    x = 14,492,237,488.77/112,769.40
  6. Step 6: Final answer
    x = 128,512.14

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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.