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Finding the Fourth Proportional to 77,168.40, 115,666.20 and 43,904.40

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Solution

The fourth proportional to 77,168.40, 115,666.20 and 43,904.40 is: 65,807.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,168.40 : 115,666.20 = 43,904.40 : x
  2. Step 2: Convert to fraction form
    77,168.40/115,666.20 = 43,904.40/x
  3. Step 3: Cross multiply
    77,168.40x = 115,666.20 × 43,904.40
  4. Step 4: Simplify right side
    77,168.40x = 5,078,255,111.28
  5. Step 5: Solve for x
    x = 5,078,255,111.28/77,168.40
  6. Step 6: Final answer
    x = 65,807.44

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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.