Home / 121,178.10-181,657.80-79,078.35

Finding the Fourth Proportional to 121,178.10, 181,657.80 and 79,078.35

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Solution

The fourth proportional to 121,178.10, 181,657.80 and 79,078.35 is: 118,546.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,178.10 : 181,657.80 = 79,078.35 : x
  2. Step 2: Convert to fraction form
    121,178.10/181,657.80 = 79,078.35/x
  3. Step 3: Cross multiply
    121,178.10x = 181,657.80 × 79,078.35
  4. Step 4: Simplify right side
    121,178.10x = 14,365,199,088.63
  5. Step 5: Solve for x
    x = 14,365,199,088.63/121,178.10
  6. Step 6: Final answer
    x = 118,546.17

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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.