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Finding the Fourth Proportional to 140,702.51, 210,999.91 and 69,600.74

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Solution

The fourth proportional to 140,702.51, 210,999.91 and 69,600.74 is: 104,374.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,702.51 : 210,999.91 = 69,600.74 : x
  2. Step 2: Convert to fraction form
    140,702.51/210,999.91 = 69,600.74/x
  3. Step 3: Cross multiply
    140,702.51x = 210,999.91 × 69,600.74
  4. Step 4: Simplify right side
    140,702.51x = 14,685,749,875.93
  5. Step 5: Solve for x
    x = 14,685,749,875.93/140,702.51
  6. Step 6: Final answer
    x = 104,374.47

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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.