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Finding the Fourth Proportional to 77,392.51, 106,802.88 and 43,408.55

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Solution

The fourth proportional to 77,392.51, 106,802.88 and 43,408.55 is: 59,904.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,392.51 : 106,802.88 = 43,408.55 : x
  2. Step 2: Convert to fraction form
    77,392.51/106,802.88 = 43,408.55/x
  3. Step 3: Cross multiply
    77,392.51x = 106,802.88 × 43,408.55
  4. Step 4: Simplify right side
    77,392.51x = 4,636,158,156.62
  5. Step 5: Solve for x
    x = 4,636,158,156.62/77,392.51
  6. Step 6: Final answer
    x = 59,904.48

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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.