Home / 256,397.06-384,632.03-78,918.86

Finding the Fourth Proportional to 256,397.06, 384,632.03 and 78,918.86

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Solution

The fourth proportional to 256,397.06, 384,632.03 and 78,918.86 is: 118,389.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,397.06 : 384,632.03 = 78,918.86 : x
  2. Step 2: Convert to fraction form
    256,397.06/384,632.03 = 78,918.86/x
  3. Step 3: Cross multiply
    256,397.06x = 384,632.03 × 78,918.86
  4. Step 4: Simplify right side
    256,397.06x = 30,354,721,327.09
  5. Step 5: Solve for x
    x = 30,354,721,327.09/256,397.06
  6. Step 6: Final answer
    x = 118,389.51

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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.