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Finding the Fourth Proportional to 70,779.60, 97,676.73 and 38,947.80

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Solution

The fourth proportional to 70,779.60, 97,676.73 and 38,947.80 is: 53,748.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,779.60 : 97,676.73 = 38,947.80 : x
  2. Step 2: Convert to fraction form
    70,779.60/97,676.73 = 38,947.80/x
  3. Step 3: Cross multiply
    70,779.60x = 97,676.73 × 38,947.80
  4. Step 4: Simplify right side
    70,779.60x = 3,804,293,744.69
  5. Step 5: Solve for x
    x = 3,804,293,744.69/70,779.60
  6. Step 6: Final answer
    x = 53,748.45

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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.