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Finding the Fourth Proportional to 139,547.70, 209,172.48 and 64,580.58

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Solution

The fourth proportional to 139,547.70, 209,172.48 and 64,580.58 is: 96,801.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,547.70 : 209,172.48 = 64,580.58 : x
  2. Step 2: Convert to fraction form
    139,547.70/209,172.48 = 64,580.58/x
  3. Step 3: Cross multiply
    139,547.70x = 209,172.48 × 64,580.58
  4. Step 4: Simplify right side
    139,547.70x = 13,508,480,078.44
  5. Step 5: Solve for x
    x = 13,508,480,078.44/139,547.70
  6. Step 6: Final answer
    x = 96,801.88

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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.