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Finding the Fourth Proportional to 156,064.74, 215,368.65 and 84,446.03

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Solution

The fourth proportional to 156,064.74, 215,368.65 and 84,446.03 is: 116,535.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,064.74 : 215,368.65 = 84,446.03 : x
  2. Step 2: Convert to fraction form
    156,064.74/215,368.65 = 84,446.03/x
  3. Step 3: Cross multiply
    156,064.74x = 215,368.65 × 84,446.03
  4. Step 4: Simplify right side
    156,064.74x = 18,187,026,402.12
  5. Step 5: Solve for x
    x = 18,187,026,402.12/156,064.74
  6. Step 6: Final answer
    x = 116,535.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.