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Finding the Fourth Proportional to 93,605.76, 139,730.40 and 86,668.92

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Solution

The fourth proportional to 93,605.76, 139,730.40 and 86,668.92 is: 129,375.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,605.76 : 139,730.40 = 86,668.92 : x
  2. Step 2: Convert to fraction form
    93,605.76/139,730.40 = 86,668.92/x
  3. Step 3: Cross multiply
    93,605.76x = 139,730.40 × 86,668.92
  4. Step 4: Simplify right side
    93,605.76x = 12,110,282,859.17
  5. Step 5: Solve for x
    x = 12,110,282,859.17/93,605.76
  6. Step 6: Final answer
    x = 129,375.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.