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Finding the Fourth Proportional to 223,615.50, 308,595 and 121,646.70

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Solution

The fourth proportional to 223,615.50, 308,595 and 121,646.70 is: 167,875.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,615.50 : 308,595 = 121,646.70 : x
  2. Step 2: Convert to fraction form
    223,615.50/308,595 = 121,646.70/x
  3. Step 3: Cross multiply
    223,615.50x = 308,595 × 121,646.70
  4. Step 4: Simplify right side
    223,615.50x = 37,539,563,386.50
  5. Step 5: Solve for x
    x = 37,539,563,386.50/223,615.50
  6. Step 6: Final answer
    x = 167,875.50

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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.