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Finding the Fourth Proportional to 122,637.60, 183,729.60 and 69,890.40

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Solution

The fourth proportional to 122,637.60, 183,729.60 and 69,890.40 is: 104,706.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,637.60 : 183,729.60 = 69,890.40 : x
  2. Step 2: Convert to fraction form
    122,637.60/183,729.60 = 69,890.40/x
  3. Step 3: Cross multiply
    122,637.60x = 183,729.60 × 69,890.40
  4. Step 4: Simplify right side
    122,637.60x = 12,840,935,235.84
  5. Step 5: Solve for x
    x = 12,840,935,235.84/122,637.60
  6. Step 6: Final answer
    x = 104,706.35

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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.