Home / 85,621.80-118,271.04-65,724.56

Finding the Fourth Proportional to 85,621.80, 118,271.04 and 65,724.56

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Solution

The fourth proportional to 85,621.80, 118,271.04 and 65,724.56 is: 90,786.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,621.80 : 118,271.04 = 65,724.56 : x
  2. Step 2: Convert to fraction form
    85,621.80/118,271.04 = 65,724.56/x
  3. Step 3: Cross multiply
    85,621.80x = 118,271.04 × 65,724.56
  4. Step 4: Simplify right side
    85,621.80x = 7,773,312,064.74
  5. Step 5: Solve for x
    x = 7,773,312,064.74/85,621.80
  6. Step 6: Final answer
    x = 90,786.60

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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.