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Finding the Fourth Proportional to 91,830.60, 137,745.90 and 77,068.35

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Solution

The fourth proportional to 91,830.60, 137,745.90 and 77,068.35 is: 115,602.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,830.60 : 137,745.90 = 77,068.35 : x
  2. Step 2: Convert to fraction form
    91,830.60/137,745.90 = 77,068.35/x
  3. Step 3: Cross multiply
    91,830.60x = 137,745.90 × 77,068.35
  4. Step 4: Simplify right side
    91,830.60x = 10,615,849,232.27
  5. Step 5: Solve for x
    x = 10,615,849,232.27/91,830.60
  6. Step 6: Final answer
    x = 115,602.53

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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.