Home / 443,921.48-665,981.76-128,402.90

Finding the Fourth Proportional to 443,921.48, 665,981.76 and 128,402.90

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Solution

The fourth proportional to 443,921.48, 665,981.76 and 128,402.90 is: 192,633.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,921.48 : 665,981.76 = 128,402.90 : x
  2. Step 2: Convert to fraction form
    443,921.48/665,981.76 = 128,402.90/x
  3. Step 3: Cross multiply
    443,921.48x = 665,981.76 × 128,402.90
  4. Step 4: Simplify right side
    443,921.48x = 85,513,989,331.10
  5. Step 5: Solve for x
    x = 85,513,989,331.10/443,921.48
  6. Step 6: Final answer
    x = 192,633.14

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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.