Home / 155,905.12-215,148.39-84,285.10

Finding the Fourth Proportional to 155,905.12, 215,148.39 and 84,285.10

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Solution

The fourth proportional to 155,905.12, 215,148.39 and 84,285.10 is: 116,313.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,905.12 : 215,148.39 = 84,285.10 : x
  2. Step 2: Convert to fraction form
    155,905.12/215,148.39 = 84,285.10/x
  3. Step 3: Cross multiply
    155,905.12x = 215,148.39 × 84,285.10
  4. Step 4: Simplify right side
    155,905.12x = 18,133,803,565.99
  5. Step 5: Solve for x
    x = 18,133,803,565.99/155,905.12
  6. Step 6: Final answer
    x = 116,313.07

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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.