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Finding the Fourth Proportional to 85,871.54, 128,807.63 and 35,916.59

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Solution

The fourth proportional to 85,871.54, 128,807.63 and 35,916.59 is: 53,875.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,871.54 : 128,807.63 = 35,916.59 : x
  2. Step 2: Convert to fraction form
    85,871.54/128,807.63 = 35,916.59/x
  3. Step 3: Cross multiply
    85,871.54x = 128,807.63 × 35,916.59
  4. Step 4: Simplify right side
    85,871.54x = 4,626,330,835.58
  5. Step 5: Solve for x
    x = 4,626,330,835.58/85,871.54
  6. Step 6: Final answer
    x = 53,875.02

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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.