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Finding the Fourth Proportional to 85,772.30, 128,681.52 and 35,835.80

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Solution

The fourth proportional to 85,772.30, 128,681.52 and 35,835.80 is: 53,763.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,772.30 : 128,681.52 = 35,835.80 : x
  2. Step 2: Convert to fraction form
    85,772.30/128,681.52 = 35,835.80/x
  3. Step 3: Cross multiply
    85,772.30x = 128,681.52 × 35,835.80
  4. Step 4: Simplify right side
    85,772.30x = 4,611,405,214.42
  5. Step 5: Solve for x
    x = 4,611,405,214.42/85,772.30
  6. Step 6: Final answer
    x = 53,763.34

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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.