Home / 78,716.34-118,075.04-28,775.90

Finding the Fourth Proportional to 78,716.34, 118,075.04 and 28,775.90

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Solution

The fourth proportional to 78,716.34, 118,075.04 and 28,775.90 is: 43,164.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,716.34 : 118,075.04 = 28,775.90 : x
  2. Step 2: Convert to fraction form
    78,716.34/118,075.04 = 28,775.90/x
  3. Step 3: Cross multiply
    78,716.34x = 118,075.04 × 28,775.90
  4. Step 4: Simplify right side
    78,716.34x = 3,397,714,809.28
  5. Step 5: Solve for x
    x = 3,397,714,809.28/78,716.34
  6. Step 6: Final answer
    x = 43,164.03

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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.