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Finding the Fourth Proportional to 210,671.49, 315,941.62 and 70,397.31

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Solution

The fourth proportional to 210,671.49, 315,941.62 and 70,397.31 is: 105,574.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,671.49 : 315,941.62 = 70,397.31 : x
  2. Step 2: Convert to fraction form
    210,671.49/315,941.62 = 70,397.31/x
  3. Step 3: Cross multiply
    210,671.49x = 315,941.62 × 70,397.31
  4. Step 4: Simplify right side
    210,671.49x = 22,241,440,165.04
  5. Step 5: Solve for x
    x = 22,241,440,165.04/210,671.49
  6. Step 6: Final answer
    x = 105,574.04

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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.