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Finding the Fourth Proportional to 292,295.20, 438,442.80 and 81,968.80

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Solution

The fourth proportional to 292,295.20, 438,442.80 and 81,968.80 is: 122,953.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,295.20 : 438,442.80 = 81,968.80 : x
  2. Step 2: Convert to fraction form
    292,295.20/438,442.80 = 81,968.80/x
  3. Step 3: Cross multiply
    292,295.20x = 438,442.80 × 81,968.80
  4. Step 4: Simplify right side
    292,295.20x = 35,938,630,184.64
  5. Step 5: Solve for x
    x = 35,938,630,184.64/292,295.20
  6. Step 6: Final answer
    x = 122,953.20

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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.