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Finding the Fourth Proportional to 152,308.78, 210,186.09 and 85,240.78

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Solution

The fourth proportional to 152,308.78, 210,186.09 and 85,240.78 is: 117,632.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,308.78 : 210,186.09 = 85,240.78 : x
  2. Step 2: Convert to fraction form
    152,308.78/210,186.09 = 85,240.78/x
  3. Step 3: Cross multiply
    152,308.78x = 210,186.09 × 85,240.78
  4. Step 4: Simplify right side
    152,308.78x = 17,916,426,256.75
  5. Step 5: Solve for x
    x = 17,916,426,256.75/152,308.78
  6. Step 6: Final answer
    x = 117,632.26

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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.