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Finding the Fourth Proportional to 382,070.57, 572,955.73 and 129,281.45

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Solution

The fourth proportional to 382,070.57, 572,955.73 and 129,281.45 is: 193,871.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,070.57 : 572,955.73 = 129,281.45 : x
  2. Step 2: Convert to fraction form
    382,070.57/572,955.73 = 129,281.45/x
  3. Step 3: Cross multiply
    382,070.57x = 572,955.73 × 129,281.45
  4. Step 4: Simplify right side
    382,070.57x = 74,072,547,560.21
  5. Step 5: Solve for x
    x = 74,072,547,560.21/382,070.57
  6. Step 6: Final answer
    x = 193,871.38

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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.