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Finding the Fourth Proportional to 86,598, 119,428.65 and 56,355.48

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Solution

The fourth proportional to 86,598, 119,428.65 and 56,355.48 is: 77,720.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,598 : 119,428.65 = 56,355.48 : x
  2. Step 2: Convert to fraction form
    86,598/119,428.65 = 56,355.48/x
  3. Step 3: Cross multiply
    86,598x = 119,428.65 × 56,355.48
  4. Step 4: Simplify right side
    86,598x = 6,730,458,896.50
  5. Step 5: Solve for x
    x = 6,730,458,896.50/86,598
  6. Step 6: Final answer
    x = 77,720.72

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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.