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Finding the Fourth Proportional to 85,533.80, 128,300.70 and 50,541.80

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Solution

The fourth proportional to 85,533.80, 128,300.70 and 50,541.80 is: 75,812.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,533.80 : 128,300.70 = 50,541.80 : x
  2. Step 2: Convert to fraction form
    85,533.80/128,300.70 = 50,541.80/x
  3. Step 3: Cross multiply
    85,533.80x = 128,300.70 × 50,541.80
  4. Step 4: Simplify right side
    85,533.80x = 6,484,548,319.26
  5. Step 5: Solve for x
    x = 6,484,548,319.26/85,533.80
  6. Step 6: Final answer
    x = 75,812.70

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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.