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Finding the Fourth Proportional to 210,168.48, 315,395.52 and 85,532.16

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Solution

The fourth proportional to 210,168.48, 315,395.52 and 85,532.16 is: 128,356.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,168.48 : 315,395.52 = 85,532.16 : x
  2. Step 2: Convert to fraction form
    210,168.48/315,395.52 = 85,532.16/x
  3. Step 3: Cross multiply
    210,168.48x = 315,395.52 × 85,532.16
  4. Step 4: Simplify right side
    210,168.48x = 26,976,460,079.92
  5. Step 5: Solve for x
    x = 26,976,460,079.92/210,168.48
  6. Step 6: Final answer
    x = 128,356.36

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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.