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Finding the Fourth Proportional to 77,808, 116,712 and 19,440

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Solution

The fourth proportional to 77,808, 116,712 and 19,440 is: 29,160

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,808 : 116,712 = 19,440 : x
  2. Step 2: Convert to fraction form
    77,808/116,712 = 19,440/x
  3. Step 3: Cross multiply
    77,808x = 116,712 × 19,440
  4. Step 4: Simplify right side
    77,808x = 2,268,881,280
  5. Step 5: Solve for x
    x = 2,268,881,280/77,808
  6. Step 6: Final answer
    x = 29,160

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.