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Finding the Fourth Proportional to 124,702.70, 187,054.05 and 31,208.30

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Solution

The fourth proportional to 124,702.70, 187,054.05 and 31,208.30 is: 46,812.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,702.70 : 187,054.05 = 31,208.30 : x
  2. Step 2: Convert to fraction form
    124,702.70/187,054.05 = 31,208.30/x
  3. Step 3: Cross multiply
    124,702.70x = 187,054.05 × 31,208.30
  4. Step 4: Simplify right side
    124,702.70x = 5,837,638,908.62
  5. Step 5: Solve for x
    x = 5,837,638,908.62/124,702.70
  6. Step 6: Final answer
    x = 46,812.45

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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.