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Finding the Fourth Proportional to 74,779.49, 103,074.81 and 65,064.13

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Solution

The fourth proportional to 74,779.49, 103,074.81 and 65,064.13 is: 89,683.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,779.49 : 103,074.81 = 65,064.13 : x
  2. Step 2: Convert to fraction form
    74,779.49/103,074.81 = 65,064.13/x
  3. Step 3: Cross multiply
    74,779.49x = 103,074.81 × 65,064.13
  4. Step 4: Simplify right side
    74,779.49x = 6,706,472,837.57
  5. Step 5: Solve for x
    x = 6,706,472,837.57/74,779.49
  6. Step 6: Final answer
    x = 89,683.32

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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.