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Finding the Fourth Proportional to 90,890.86, 136,354.72 and 38,300.32

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Solution

The fourth proportional to 90,890.86, 136,354.72 and 38,300.32 is: 57,458.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,890.86 : 136,354.72 = 38,300.32 : x
  2. Step 2: Convert to fraction form
    90,890.86/136,354.72 = 38,300.32/x
  3. Step 3: Cross multiply
    90,890.86x = 136,354.72 × 38,300.32
  4. Step 4: Simplify right side
    90,890.86x = 5,222,429,409.51
  5. Step 5: Solve for x
    x = 5,222,429,409.51/90,890.86
  6. Step 6: Final answer
    x = 57,458.25

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1.5x scale

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.