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Finding the Fourth Proportional to 122,661.40, 183,992.10 and 105,165.40

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Solution

The fourth proportional to 122,661.40, 183,992.10 and 105,165.40 is: 157,748.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,661.40 : 183,992.10 = 105,165.40 : x
  2. Step 2: Convert to fraction form
    122,661.40/183,992.10 = 105,165.40/x
  3. Step 3: Cross multiply
    122,661.40x = 183,992.10 × 105,165.40
  4. Step 4: Simplify right side
    122,661.40x = 19,349,602,793.34
  5. Step 5: Solve for x
    x = 19,349,602,793.34/122,661.40
  6. Step 6: Final answer
    x = 157,748.10

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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.