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Finding the Fourth Proportional to 292,078.40, 438,085.20 and 81,737.60

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Solution

The fourth proportional to 292,078.40, 438,085.20 and 81,737.60 is: 122,597.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,078.40 : 438,085.20 = 81,737.60 : x
  2. Step 2: Convert to fraction form
    292,078.40/438,085.20 = 81,737.60/x
  3. Step 3: Cross multiply
    292,078.40x = 438,085.20 × 81,737.60
  4. Step 4: Simplify right side
    292,078.40x = 35,808,032,843.52
  5. Step 5: Solve for x
    x = 35,808,032,843.52/292,078.40
  6. Step 6: Final answer
    x = 122,597.33

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1.5x scale

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.