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Finding the Fourth Proportional to 122,510.40, 169,051.20 and 68,801.28

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Solution

The fourth proportional to 122,510.40, 169,051.20 and 68,801.28 is: 94,938.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,510.40 : 169,051.20 = 68,801.28 : x
  2. Step 2: Convert to fraction form
    122,510.40/169,051.20 = 68,801.28/x
  3. Step 3: Cross multiply
    122,510.40x = 169,051.20 × 68,801.28
  4. Step 4: Simplify right side
    122,510.40x = 11,630,938,945.54
  5. Step 5: Solve for x
    x = 11,630,938,945.54/122,510.40
  6. Step 6: Final answer
    x = 94,938.38

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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.