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Finding the Fourth Proportional to 86,916.60, 130,322.10 and 34,265.40

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Solution

The fourth proportional to 86,916.60, 130,322.10 and 34,265.40 is: 51,377.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,916.60 : 130,322.10 = 34,265.40 : x
  2. Step 2: Convert to fraction form
    86,916.60/130,322.10 = 34,265.40/x
  3. Step 3: Cross multiply
    86,916.60x = 130,322.10 × 34,265.40
  4. Step 4: Simplify right side
    86,916.60x = 4,465,538,885.34
  5. Step 5: Solve for x
    x = 4,465,538,885.34/86,916.60
  6. Step 6: Final answer
    x = 51,377.28

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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.