Home / 280,779.81-421,336.44-103,411.23

Finding the Fourth Proportional to 280,779.81, 421,336.44 and 103,411.23

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Solution

The fourth proportional to 280,779.81, 421,336.44 and 103,411.23 is: 155,178.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,779.81 : 421,336.44 = 103,411.23 : x
  2. Step 2: Convert to fraction form
    280,779.81/421,336.44 = 103,411.23/x
  3. Step 3: Cross multiply
    280,779.81x = 421,336.44 × 103,411.23
  4. Step 4: Simplify right side
    280,779.81x = 43,570,919,504.22
  5. Step 5: Solve for x
    x = 43,570,919,504.22/280,779.81
  6. Step 6: Final answer
    x = 155,178.25

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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.