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Finding the Fourth Proportional to 135,038.60, 202,557.90 and 84,956.30

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Solution

The fourth proportional to 135,038.60, 202,557.90 and 84,956.30 is: 127,434.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,038.60 : 202,557.90 = 84,956.30 : x
  2. Step 2: Convert to fraction form
    135,038.60/202,557.90 = 84,956.30/x
  3. Step 3: Cross multiply
    135,038.60x = 202,557.90 × 84,956.30
  4. Step 4: Simplify right side
    135,038.60x = 17,208,569,719.77
  5. Step 5: Solve for x
    x = 17,208,569,719.77/135,038.60
  6. Step 6: Final answer
    x = 127,434.45

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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.