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Finding the Fourth Proportional to 210,461.79, 315,693.09 and 70,220.82

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Solution

The fourth proportional to 210,461.79, 315,693.09 and 70,220.82 is: 105,331.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,461.79 : 315,693.09 = 70,220.82 : x
  2. Step 2: Convert to fraction form
    210,461.79/315,693.09 = 70,220.82/x
  3. Step 3: Cross multiply
    210,461.79x = 315,693.09 × 70,220.82
  4. Step 4: Simplify right side
    210,461.79x = 22,168,227,648.13
  5. Step 5: Solve for x
    x = 22,168,227,648.13/210,461.79
  6. Step 6: Final answer
    x = 105,331.37

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1.5x scale

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.