Home / 78,570.24-117,855.36-64,690.08

Finding the Fourth Proportional to 78,570.24, 117,855.36 and 64,690.08

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Solution

The fourth proportional to 78,570.24, 117,855.36 and 64,690.08 is: 97,035.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,570.24 : 117,855.36 = 64,690.08 : x
  2. Step 2: Convert to fraction form
    78,570.24/117,855.36 = 64,690.08/x
  3. Step 3: Cross multiply
    78,570.24x = 117,855.36 × 64,690.08
  4. Step 4: Simplify right side
    78,570.24x = 7,624,072,666.83
  5. Step 5: Solve for x
    x = 7,624,072,666.83/78,570.24
  6. Step 6: Final answer
    x = 97,035.12

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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.