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Finding the Fourth Proportional to 65,130.12, 89,893.60 and 39,644.68

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Solution

The fourth proportional to 65,130.12, 89,893.60 and 39,644.68 is: 54,718.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,130.12 : 89,893.60 = 39,644.68 : x
  2. Step 2: Convert to fraction form
    65,130.12/89,893.60 = 39,644.68/x
  3. Step 3: Cross multiply
    65,130.12x = 89,893.60 × 39,644.68
  4. Step 4: Simplify right side
    65,130.12x = 3,563,803,006.05
  5. Step 5: Solve for x
    x = 3,563,803,006.05/65,130.12
  6. Step 6: Final answer
    x = 54,718.20

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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.