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Finding the Fourth Proportional to 205,051.40, 307,577.10 and 86,683.40

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Solution

The fourth proportional to 205,051.40, 307,577.10 and 86,683.40 is: 130,025.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,051.40 : 307,577.10 = 86,683.40 : x
  2. Step 2: Convert to fraction form
    205,051.40/307,577.10 = 86,683.40/x
  3. Step 3: Cross multiply
    205,051.40x = 307,577.10 × 86,683.40
  4. Step 4: Simplify right side
    205,051.40x = 26,661,828,790.14
  5. Step 5: Solve for x
    x = 26,661,828,790.14/205,051.40
  6. Step 6: Final answer
    x = 130,025.10

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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.