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Finding the Fourth Proportional to 229,720.80, 316,941.48 and 139,047.72

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Solution

The fourth proportional to 229,720.80, 316,941.48 and 139,047.72 is: 191,841.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,720.80 : 316,941.48 = 139,047.72 : x
  2. Step 2: Convert to fraction form
    229,720.80/316,941.48 = 139,047.72/x
  3. Step 3: Cross multiply
    229,720.80x = 316,941.48 × 139,047.72
  4. Step 4: Simplify right side
    229,720.80x = 44,069,990,167.43
  5. Step 5: Solve for x
    x = 44,069,990,167.43/229,720.80
  6. Step 6: Final answer
    x = 191,841.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.