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Finding the Fourth Proportional to 111,989.63, 154,545.68 and 61,688.63

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Solution

The fourth proportional to 111,989.63, 154,545.68 and 61,688.63 is: 85,130.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,989.63 : 154,545.68 = 61,688.63 : x
  2. Step 2: Convert to fraction form
    111,989.63/154,545.68 = 61,688.63/x
  3. Step 3: Cross multiply
    111,989.63x = 154,545.68 × 61,688.63
  4. Step 4: Simplify right side
    111,989.63x = 9,533,710,653.11
  5. Step 5: Solve for x
    x = 9,533,710,653.11/111,989.63
  6. Step 6: Final answer
    x = 85,130.30

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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.