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Finding the Fourth Proportional to 74,779.84, 103,196.24 and 40,788.40

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Solution

The fourth proportional to 74,779.84, 103,196.24 and 40,788.40 is: 56,288.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,779.84 : 103,196.24 = 40,788.40 : x
  2. Step 2: Convert to fraction form
    74,779.84/103,196.24 = 40,788.40/x
  3. Step 3: Cross multiply
    74,779.84x = 103,196.24 × 40,788.40
  4. Step 4: Simplify right side
    74,779.84x = 4,209,209,515.62
  5. Step 5: Solve for x
    x = 4,209,209,515.62/74,779.84
  6. Step 6: Final answer
    x = 56,288.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.