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Finding the Fourth Proportional to 352,761.30, 528,988.86 and 128,047.08

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Solution

The fourth proportional to 352,761.30, 528,988.86 and 128,047.08 is: 192,015.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,761.30 : 528,988.86 = 128,047.08 : x
  2. Step 2: Convert to fraction form
    352,761.30/528,988.86 = 128,047.08/x
  3. Step 3: Cross multiply
    352,761.30x = 528,988.86 × 128,047.08
  4. Step 4: Simplify right side
    352,761.30x = 67,735,478,875.53
  5. Step 5: Solve for x
    x = 67,735,478,875.53/352,761.30
  6. Step 6: Final answer
    x = 192,015.05

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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.