Home / 272,938.30-409,465.05-85,968.70

Finding the Fourth Proportional to 272,938.30, 409,465.05 and 85,968.70

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Solution

The fourth proportional to 272,938.30, 409,465.05 and 85,968.70 is: 128,971.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,938.30 : 409,465.05 = 85,968.70 : x
  2. Step 2: Convert to fraction form
    272,938.30/409,465.05 = 85,968.70/x
  3. Step 3: Cross multiply
    272,938.30x = 409,465.05 × 85,968.70
  4. Step 4: Simplify right side
    272,938.30x = 35,201,178,043.94
  5. Step 5: Solve for x
    x = 35,201,178,043.94/272,938.30
  6. Step 6: Final answer
    x = 128,971.19

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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.