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Finding the Fourth Proportional to 103,855.50, 143,330.70 and 61,427.70

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Solution

The fourth proportional to 103,855.50, 143,330.70 and 61,427.70 is: 84,776.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,855.50 : 143,330.70 = 61,427.70 : x
  2. Step 2: Convert to fraction form
    103,855.50/143,330.70 = 61,427.70/x
  3. Step 3: Cross multiply
    103,855.50x = 143,330.70 × 61,427.70
  4. Step 4: Simplify right side
    103,855.50x = 8,804,475,240.39
  5. Step 5: Solve for x
    x = 8,804,475,240.39/103,855.50
  6. Step 6: Final answer
    x = 84,776.21

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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.