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Finding the Fourth Proportional to 208,602.76, 312,800.63 and 66,429.51

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Solution

The fourth proportional to 208,602.76, 312,800.63 and 66,429.51 is: 99,611.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,602.76 : 312,800.63 = 66,429.51 : x
  2. Step 2: Convert to fraction form
    208,602.76/312,800.63 = 66,429.51/x
  3. Step 3: Cross multiply
    208,602.76x = 312,800.63 × 66,429.51
  4. Step 4: Simplify right side
    208,602.76x = 20,779,192,578.59
  5. Step 5: Solve for x
    x = 20,779,192,578.59/208,602.76
  6. Step 6: Final answer
    x = 99,611.30

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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.