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Finding the Fourth Proportional to 102,006.40, 153,009.60 and 86,916.10

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Solution

The fourth proportional to 102,006.40, 153,009.60 and 86,916.10 is: 130,374.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,006.40 : 153,009.60 = 86,916.10 : x
  2. Step 2: Convert to fraction form
    102,006.40/153,009.60 = 86,916.10/x
  3. Step 3: Cross multiply
    102,006.40x = 153,009.60 × 86,916.10
  4. Step 4: Simplify right side
    102,006.40x = 13,298,997,694.56
  5. Step 5: Solve for x
    x = 13,298,997,694.56/102,006.40
  6. Step 6: Final answer
    x = 130,374.15

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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.