Home / 77,280.63-106,542.56-66,070.55

Finding the Fourth Proportional to 77,280.63, 106,542.56 and 66,070.55

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Solution

The fourth proportional to 77,280.63, 106,542.56 and 66,070.55 is: 91,087.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,280.63 : 106,542.56 = 66,070.55 : x
  2. Step 2: Convert to fraction form
    77,280.63/106,542.56 = 66,070.55/x
  3. Step 3: Cross multiply
    77,280.63x = 106,542.56 × 66,070.55
  4. Step 4: Simplify right side
    77,280.63x = 7,039,325,004.90
  5. Step 5: Solve for x
    x = 7,039,325,004.90/77,280.63
  6. Step 6: Final answer
    x = 91,087.83

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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.