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Finding the Fourth Proportional to 56,603.18, 78,108.58 and 31,108.99

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Solution

The fourth proportional to 56,603.18, 78,108.58 and 31,108.99 is: 42,928.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,603.18 : 78,108.58 = 31,108.99 : x
  2. Step 2: Convert to fraction form
    56,603.18/78,108.58 = 31,108.99/x
  3. Step 3: Cross multiply
    56,603.18x = 78,108.58 × 31,108.99
  4. Step 4: Simplify right side
    56,603.18x = 2,429,879,034.13
  5. Step 5: Solve for x
    x = 2,429,879,034.13/56,603.18
  6. Step 6: Final answer
    x = 42,928.31

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.