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Finding the Fourth Proportional to 74,578.01, 102,955.74 and 57,543.98

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Solution

The fourth proportional to 74,578.01, 102,955.74 and 57,543.98 is: 79,440.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,578.01 : 102,955.74 = 57,543.98 : x
  2. Step 2: Convert to fraction form
    74,578.01/102,955.74 = 57,543.98/x
  3. Step 3: Cross multiply
    74,578.01x = 102,955.74 × 57,543.98
  4. Step 4: Simplify right side
    74,578.01x = 5,924,483,043.45
  5. Step 5: Solve for x
    x = 5,924,483,043.45/74,578.01
  6. Step 6: Final answer
    x = 79,440.08

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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.