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Finding the Fourth Proportional to 85,595.40, 128,124 and 58,784.40

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Solution

The fourth proportional to 85,595.40, 128,124 and 58,784.40 is: 87,991.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,595.40 : 128,124 = 58,784.40 : x
  2. Step 2: Convert to fraction form
    85,595.40/128,124 = 58,784.40/x
  3. Step 3: Cross multiply
    85,595.40x = 128,124 × 58,784.40
  4. Step 4: Simplify right side
    85,595.40x = 7,531,692,465.60
  5. Step 5: Solve for x
    x = 7,531,692,465.60/85,595.40
  6. Step 6: Final answer
    x = 87,991.79

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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.