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Finding the Fourth Proportional to 80,420.30, 110,963.40 and 46,428.20

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Solution

The fourth proportional to 80,420.30, 110,963.40 and 46,428.20 is: 64,061.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,420.30 : 110,963.40 = 46,428.20 : x
  2. Step 2: Convert to fraction form
    80,420.30/110,963.40 = 46,428.20/x
  3. Step 3: Cross multiply
    80,420.30x = 110,963.40 × 46,428.20
  4. Step 4: Simplify right side
    80,420.30x = 5,151,830,927.88
  5. Step 5: Solve for x
    x = 5,151,830,927.88/80,420.30
  6. Step 6: Final answer
    x = 64,061.32

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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.