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Finding the Fourth Proportional to 121,207.30, 181,810.95 and 79,216.90

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Solution

The fourth proportional to 121,207.30, 181,810.95 and 79,216.90 is: 118,825.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,207.30 : 181,810.95 = 79,216.90 : x
  2. Step 2: Convert to fraction form
    121,207.30/181,810.95 = 79,216.90/x
  3. Step 3: Cross multiply
    121,207.30x = 181,810.95 × 79,216.90
  4. Step 4: Simplify right side
    121,207.30x = 14,402,499,845.06
  5. Step 5: Solve for x
    x = 14,402,499,845.06/121,207.30
  6. Step 6: Final answer
    x = 118,825.35

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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.