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Finding the Fourth Proportional to 53,308.68, 79,765.70 and 42,746.40

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Solution

The fourth proportional to 53,308.68, 79,765.70 and 42,746.40 is: 63,961.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,308.68 : 79,765.70 = 42,746.40 : x
  2. Step 2: Convert to fraction form
    53,308.68/79,765.70 = 42,746.40/x
  3. Step 3: Cross multiply
    53,308.68x = 79,765.70 × 42,746.40
  4. Step 4: Simplify right side
    53,308.68x = 3,409,696,304.75
  5. Step 5: Solve for x
    x = 3,409,696,304.75/53,308.68
  6. Step 6: Final answer
    x = 63,961.37

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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.