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Finding the Fourth Proportional to 85,846.30, 128,807.85 and 39,075.10

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Solution

The fourth proportional to 85,846.30, 128,807.85 and 39,075.10 is: 58,630.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,846.30 : 128,807.85 = 39,075.10 : x
  2. Step 2: Convert to fraction form
    85,846.30/128,807.85 = 39,075.10/x
  3. Step 3: Cross multiply
    85,846.30x = 128,807.85 × 39,075.10
  4. Step 4: Simplify right side
    85,846.30x = 5,033,179,619.54
  5. Step 5: Solve for x
    x = 5,033,179,619.54/85,846.30
  6. Step 6: Final answer
    x = 58,630.13

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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.