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Finding the Fourth Proportional to 156,048.90, 215,347.49 and 84,428.90

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Solution

The fourth proportional to 156,048.90, 215,347.49 and 84,428.90 is: 116,511.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,048.90 : 215,347.49 = 84,428.90 : x
  2. Step 2: Convert to fraction form
    156,048.90/215,347.49 = 84,428.90/x
  3. Step 3: Cross multiply
    156,048.90x = 215,347.49 × 84,428.90
  4. Step 4: Simplify right side
    156,048.90x = 18,181,551,698.46
  5. Step 5: Solve for x
    x = 18,181,551,698.46/156,048.90
  6. Step 6: Final answer
    x = 116,511.89

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1.5x scale

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.