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Finding the Fourth Proportional to 123,810, 170,853.20 and 67,220.16

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Solution

The fourth proportional to 123,810, 170,853.20 and 67,220.16 is: 92,761.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,810 : 170,853.20 = 67,220.16 : x
  2. Step 2: Convert to fraction form
    123,810/170,853.20 = 67,220.16/x
  3. Step 3: Cross multiply
    123,810x = 170,853.20 × 67,220.16
  4. Step 4: Simplify right side
    123,810x = 11,484,779,440.51
  5. Step 5: Solve for x
    x = 11,484,779,440.51/123,810
  6. Step 6: Final answer
    x = 92,761.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.