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Finding the Fourth Proportional to 74,779.81, 103,194.25 and 40,789.07

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Solution

The fourth proportional to 74,779.81, 103,194.25 and 40,789.07 is: 56,287.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,779.81 : 103,194.25 = 40,789.07 : x
  2. Step 2: Convert to fraction form
    74,779.81/103,194.25 = 40,789.07/x
  3. Step 3: Cross multiply
    74,779.81x = 103,194.25 × 40,789.07
  4. Step 4: Simplify right side
    74,779.81x = 4,209,197,485.32
  5. Step 5: Solve for x
    x = 4,209,197,485.32/74,779.81
  6. Step 6: Final answer
    x = 56,287.89

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1.5x scale

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.