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Finding the Fourth Proportional to 85,090.36, 127,692.96 and 64,045.95

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Solution

The fourth proportional to 85,090.36, 127,692.96 and 64,045.95 is: 96,112.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,090.36 : 127,692.96 = 64,045.95 : x
  2. Step 2: Convert to fraction form
    85,090.36/127,692.96 = 64,045.95/x
  3. Step 3: Cross multiply
    85,090.36x = 127,692.96 × 64,045.95
  4. Step 4: Simplify right side
    85,090.36x = 8,178,216,931.51
  5. Step 5: Solve for x
    x = 8,178,216,931.51/85,090.36
  6. Step 6: Final answer
    x = 96,112.14

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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.