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Finding the Fourth Proportional to 154,699.87, 213,498.88 and 86,715.76

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Solution

The fourth proportional to 154,699.87, 213,498.88 and 86,715.76 is: 119,675.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,699.87 : 213,498.88 = 86,715.76 : x
  2. Step 2: Convert to fraction form
    154,699.87/213,498.88 = 86,715.76/x
  3. Step 3: Cross multiply
    154,699.87x = 213,498.88 × 86,715.76
  4. Step 4: Simplify right side
    154,699.87x = 18,513,718,280.49
  5. Step 5: Solve for x
    x = 18,513,718,280.49/154,699.87
  6. Step 6: Final answer
    x = 119,675.07

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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.