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Finding the Fourth Proportional to 141,322.79, 212,005.70 and 87,971.60

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Solution

The fourth proportional to 141,322.79, 212,005.70 and 87,971.60 is: 131,970.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,322.79 : 212,005.70 = 87,971.60 : x
  2. Step 2: Convert to fraction form
    141,322.79/212,005.70 = 87,971.60/x
  3. Step 3: Cross multiply
    141,322.79x = 212,005.70 × 87,971.60
  4. Step 4: Simplify right side
    141,322.79x = 18,650,480,638.12
  5. Step 5: Solve for x
    x = 18,650,480,638.12/141,322.79
  6. Step 6: Final answer
    x = 131,970.79

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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.