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Finding the Fourth Proportional to 85,274.25, 128,000.10 and 62,810.30

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Solution

The fourth proportional to 85,274.25, 128,000.10 and 62,810.30 is: 94,280.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,274.25 : 128,000.10 = 62,810.30 : x
  2. Step 2: Convert to fraction form
    85,274.25/128,000.10 = 62,810.30/x
  3. Step 3: Cross multiply
    85,274.25x = 128,000.10 × 62,810.30
  4. Step 4: Simplify right side
    85,274.25x = 8,039,724,041.03
  5. Step 5: Solve for x
    x = 8,039,724,041.03/85,274.25
  6. Step 6: Final answer
    x = 94,280.79

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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.