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Finding the Fourth Proportional to 64,940.80, 97,411.20 and 51,818.80

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Solution

The fourth proportional to 64,940.80, 97,411.20 and 51,818.80 is: 77,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,940.80 : 97,411.20 = 51,818.80 : x
  2. Step 2: Convert to fraction form
    64,940.80/97,411.20 = 51,818.80/x
  3. Step 3: Cross multiply
    64,940.80x = 97,411.20 × 51,818.80
  4. Step 4: Simplify right side
    64,940.80x = 5,047,731,490.56
  5. Step 5: Solve for x
    x = 5,047,731,490.56/64,940.80
  6. Step 6: Final answer
    x = 77,728.20

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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.