Home / 58,779.64-81,140.74-39,685.28

Finding the Fourth Proportional to 58,779.64, 81,140.74 and 39,685.28

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Solution

The fourth proportional to 58,779.64, 81,140.74 and 39,685.28 is: 54,782.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,779.64 : 81,140.74 = 39,685.28 : x
  2. Step 2: Convert to fraction form
    58,779.64/81,140.74 = 39,685.28/x
  3. Step 3: Cross multiply
    58,779.64x = 81,140.74 × 39,685.28
  4. Step 4: Simplify right side
    58,779.64x = 3,220,092,481.39
  5. Step 5: Solve for x
    x = 3,220,092,481.39/58,779.64
  6. Step 6: Final answer
    x = 54,782.45

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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.