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Finding the Fourth Proportional to 121,969.34, 168,295.55 and 70,278.38

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Solution

The fourth proportional to 121,969.34, 168,295.55 and 70,278.38 is: 96,971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,969.34 : 168,295.55 = 70,278.38 : x
  2. Step 2: Convert to fraction form
    121,969.34/168,295.55 = 70,278.38/x
  3. Step 3: Cross multiply
    121,969.34x = 168,295.55 × 70,278.38
  4. Step 4: Simplify right side
    121,969.34x = 11,827,537,422.34
  5. Step 5: Solve for x
    x = 11,827,537,422.34/121,969.34
  6. Step 6: Final answer
    x = 96,971.40

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1.5x scale

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.