Home / 77,280.51-106,542.39-66,070.42

Finding the Fourth Proportional to 77,280.51, 106,542.39 and 66,070.42

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Solution

The fourth proportional to 77,280.51, 106,542.39 and 66,070.42 is: 91,087.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,280.51 : 106,542.39 = 66,070.42 : x
  2. Step 2: Convert to fraction form
    77,280.51/106,542.39 = 66,070.42/x
  3. Step 3: Cross multiply
    77,280.51x = 106,542.39 × 66,070.42
  4. Step 4: Simplify right side
    77,280.51x = 7,039,300,340.52
  5. Step 5: Solve for x
    x = 7,039,300,340.52/77,280.51
  6. Step 6: Final answer
    x = 91,087.66

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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.