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Finding the Fourth Proportional to 85,374.48, 128,076.90 and 29,220.84

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Solution

The fourth proportional to 85,374.48, 128,076.90 and 29,220.84 is: 43,836.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,374.48 : 128,076.90 = 29,220.84 : x
  2. Step 2: Convert to fraction form
    85,374.48/128,076.90 = 29,220.84/x
  3. Step 3: Cross multiply
    85,374.48x = 128,076.90 × 29,220.84
  4. Step 4: Simplify right side
    85,374.48x = 3,742,514,602.60
  5. Step 5: Solve for x
    x = 3,742,514,602.60/85,374.48
  6. Step 6: Final answer
    x = 43,836.46

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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.