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Finding the Fourth Proportional to 85,673.25, 128,363.64 and 60,671.76

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Solution

The fourth proportional to 85,673.25, 128,363.64 and 60,671.76 is: 90,904.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,673.25 : 128,363.64 = 60,671.76 : x
  2. Step 2: Convert to fraction form
    85,673.25/128,363.64 = 60,671.76/x
  3. Step 3: Cross multiply
    85,673.25x = 128,363.64 × 60,671.76
  4. Step 4: Simplify right side
    85,673.25x = 7,788,047,958.81
  5. Step 5: Solve for x
    x = 7,788,047,958.81/85,673.25
  6. Step 6: Final answer
    x = 90,904.08

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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.