Home / 121,146.60-181,827.90-71,164.20

Finding the Fourth Proportional to 121,146.60, 181,827.90 and 71,164.20

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Solution

The fourth proportional to 121,146.60, 181,827.90 and 71,164.20 is: 106,809.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,146.60 : 181,827.90 = 71,164.20 : x
  2. Step 2: Convert to fraction form
    121,146.60/181,827.90 = 71,164.20/x
  3. Step 3: Cross multiply
    121,146.60x = 181,827.90 × 71,164.20
  4. Step 4: Simplify right side
    121,146.60x = 12,939,637,041.18
  5. Step 5: Solve for x
    x = 12,939,637,041.18/121,146.60
  6. Step 6: Final answer
    x = 106,809.74

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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.