Home / 64,590.78-89,134.14-39,440.28

Finding the Fourth Proportional to 64,590.78, 89,134.14 and 39,440.28

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Solution

The fourth proportional to 64,590.78, 89,134.14 and 39,440.28 is: 54,426.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,590.78 : 89,134.14 = 39,440.28 : x
  2. Step 2: Convert to fraction form
    64,590.78/89,134.14 = 39,440.28/x
  3. Step 3: Cross multiply
    64,590.78x = 89,134.14 × 39,440.28
  4. Step 4: Simplify right side
    64,590.78x = 3,515,475,439.16
  5. Step 5: Solve for x
    x = 3,515,475,439.16/64,590.78
  6. Step 6: Final answer
    x = 54,426.89

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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.