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Finding the Fourth Proportional to 77,095.72, 115,643.58 and 20,941.12

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Solution

The fourth proportional to 77,095.72, 115,643.58 and 20,941.12 is: 31,411.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,095.72 : 115,643.58 = 20,941.12 : x
  2. Step 2: Convert to fraction form
    77,095.72/115,643.58 = 20,941.12/x
  3. Step 3: Cross multiply
    77,095.72x = 115,643.58 × 20,941.12
  4. Step 4: Simplify right side
    77,095.72x = 2,421,706,086.01
  5. Step 5: Solve for x
    x = 2,421,706,086.01/77,095.72
  6. Step 6: Final answer
    x = 31,411.68

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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.