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Finding the Fourth Proportional to 153,384.72, 211,669.22 and 85,400.20

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Solution

The fourth proportional to 153,384.72, 211,669.22 and 85,400.20 is: 117,851.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,384.72 : 211,669.22 = 85,400.20 : x
  2. Step 2: Convert to fraction form
    153,384.72/211,669.22 = 85,400.20/x
  3. Step 3: Cross multiply
    153,384.72x = 211,669.22 × 85,400.20
  4. Step 4: Simplify right side
    153,384.72x = 18,076,593,721.84
  5. Step 5: Solve for x
    x = 18,076,593,721.84/153,384.72
  6. Step 6: Final answer
    x = 117,851.33

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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.