Home / 78,742.10-118,125.04-25,416.25

Finding the Fourth Proportional to 78,742.10, 118,125.04 and 25,416.25

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Solution

The fourth proportional to 78,742.10, 118,125.04 and 25,416.25 is: 38,128.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,742.10 : 118,125.04 = 25,416.25 : x
  2. Step 2: Convert to fraction form
    78,742.10/118,125.04 = 25,416.25/x
  3. Step 3: Cross multiply
    78,742.10x = 118,125.04 × 25,416.25
  4. Step 4: Simplify right side
    78,742.10x = 3,002,295,547.90
  5. Step 5: Solve for x
    x = 3,002,295,547.90/78,742.10
  6. Step 6: Final answer
    x = 38,128.21

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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.