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Finding the Fourth Proportional to 181,440.80, 272,161.20 and 139,968.80

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Solution

The fourth proportional to 181,440.80, 272,161.20 and 139,968.80 is: 209,953.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,440.80 : 272,161.20 = 139,968.80 : x
  2. Step 2: Convert to fraction form
    181,440.80/272,161.20 = 139,968.80/x
  3. Step 3: Cross multiply
    181,440.80x = 272,161.20 × 139,968.80
  4. Step 4: Simplify right side
    181,440.80x = 38,094,076,570.56
  5. Step 5: Solve for x
    x = 38,094,076,570.56/181,440.80
  6. Step 6: Final answer
    x = 209,953.20

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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.