Home / 154,818.28-213,638.34-86,830.12

Finding the Fourth Proportional to 154,818.28, 213,638.34 and 86,830.12

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Solution

The fourth proportional to 154,818.28, 213,638.34 and 86,830.12 is: 119,819.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,818.28 : 213,638.34 = 86,830.12 : x
  2. Step 2: Convert to fraction form
    154,818.28/213,638.34 = 86,830.12/x
  3. Step 3: Cross multiply
    154,818.28x = 213,638.34 × 86,830.12
  4. Step 4: Simplify right side
    154,818.28x = 18,550,242,698.80
  5. Step 5: Solve for x
    x = 18,550,242,698.80/154,818.28
  6. Step 6: Final answer
    x = 119,819.46

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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.