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Finding the Fourth Proportional to 78,064.99, 117,097.30 and 60,321.45

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Solution

The fourth proportional to 78,064.99, 117,097.30 and 60,321.45 is: 90,482.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,064.99 : 117,097.30 = 60,321.45 : x
  2. Step 2: Convert to fraction form
    78,064.99/117,097.30 = 60,321.45/x
  3. Step 3: Cross multiply
    78,064.99x = 117,097.30 × 60,321.45
  4. Step 4: Simplify right side
    78,064.99x = 7,063,478,927.09
  5. Step 5: Solve for x
    x = 7,063,478,927.09/78,064.99
  6. Step 6: Final answer
    x = 90,482.03

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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.