Home / 117,678.12-162,285.12-90,778.08

Finding the Fourth Proportional to 117,678.12, 162,285.12 and 90,778.08

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Solution

The fourth proportional to 117,678.12, 162,285.12 and 90,778.08 is: 125,188.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,678.12 : 162,285.12 = 90,778.08 : x
  2. Step 2: Convert to fraction form
    117,678.12/162,285.12 = 90,778.08/x
  3. Step 3: Cross multiply
    117,678.12x = 162,285.12 × 90,778.08
  4. Step 4: Simplify right side
    117,678.12x = 14,731,931,606.17
  5. Step 5: Solve for x
    x = 14,731,931,606.17/117,678.12
  6. Step 6: Final answer
    x = 125,188.37

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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.