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Finding the Fourth Proportional to 292,125.60, 438,145.20 and 81,784.80

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Solution

The fourth proportional to 292,125.60, 438,145.20 and 81,784.80 is: 122,665.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,125.60 : 438,145.20 = 81,784.80 : x
  2. Step 2: Convert to fraction form
    292,125.60/438,145.20 = 81,784.80/x
  3. Step 3: Cross multiply
    292,125.60x = 438,145.20 × 81,784.80
  4. Step 4: Simplify right side
    292,125.60x = 35,833,617,552.96
  5. Step 5: Solve for x
    x = 35,833,617,552.96/292,125.60
  6. Step 6: Final answer
    x = 122,665.11

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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.