Home / 78,681.97-118,041.40-31,299.75

Finding the Fourth Proportional to 78,681.97, 118,041.40 and 31,299.75

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Solution

The fourth proportional to 78,681.97, 118,041.40 and 31,299.75 is: 46,956.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,681.97 : 118,041.40 = 31,299.75 : x
  2. Step 2: Convert to fraction form
    78,681.97/118,041.40 = 31,299.75/x
  3. Step 3: Cross multiply
    78,681.97x = 118,041.40 × 31,299.75
  4. Step 4: Simplify right side
    78,681.97x = 3,694,666,172.71
  5. Step 5: Solve for x
    x = 3,694,666,172.71/78,681.97
  6. Step 6: Final answer
    x = 46,956.96

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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.