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Finding the Fourth Proportional to 134,609, 201,971.80 and 72,206.60

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Solution

The fourth proportional to 134,609, 201,971.80 and 72,206.60 is: 108,341.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,609 : 201,971.80 = 72,206.60 : x
  2. Step 2: Convert to fraction form
    134,609/201,971.80 = 72,206.60/x
  3. Step 3: Cross multiply
    134,609x = 201,971.80 × 72,206.60
  4. Step 4: Simplify right side
    134,609x = 14,583,696,973.88
  5. Step 5: Solve for x
    x = 14,583,696,973.88/134,609
  6. Step 6: Final answer
    x = 108,341.17

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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.