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Finding the Fourth Proportional to 141,804.40, 212,706.60 and 138,305.20

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Solution

The fourth proportional to 141,804.40, 212,706.60 and 138,305.20 is: 207,457.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,804.40 : 212,706.60 = 138,305.20 : x
  2. Step 2: Convert to fraction form
    141,804.40/212,706.60 = 138,305.20/x
  3. Step 3: Cross multiply
    141,804.40x = 212,706.60 × 138,305.20
  4. Step 4: Simplify right side
    141,804.40x = 29,418,428,854.32
  5. Step 5: Solve for x
    x = 29,418,428,854.32/141,804.40
  6. Step 6: Final answer
    x = 207,457.80

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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.