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Finding the Fourth Proportional to 76,692.30, 115,038.45 and 57,009.30

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Solution

The fourth proportional to 76,692.30, 115,038.45 and 57,009.30 is: 85,513.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,692.30 : 115,038.45 = 57,009.30 : x
  2. Step 2: Convert to fraction form
    76,692.30/115,038.45 = 57,009.30/x
  3. Step 3: Cross multiply
    76,692.30x = 115,038.45 × 57,009.30
  4. Step 4: Simplify right side
    76,692.30x = 6,558,261,507.59
  5. Step 5: Solve for x
    x = 6,558,261,507.59/76,692.30
  6. Step 6: Final answer
    x = 85,513.95

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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.