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Finding the Fourth Proportional to 42,624,266.40, 63,862,916.40 and 19,858,471.20

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Solution

The fourth proportional to 42,624,266.40, 63,862,916.40 and 19,858,471.20 is: 29,753,471.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,624,266.40 : 63,862,916.40 = 19,858,471.20 : x
  2. Step 2: Convert to fraction form
    42,624,266.40/63,862,916.40 = 19,858,471.20/x
  3. Step 3: Cross multiply
    42,624,266.40x = 63,862,916.40 × 19,858,471.20
  4. Step 4: Simplify right side
    42,624,266.40x = 1,268,219,886,077,407.50
  5. Step 5: Solve for x
    x = 1,268,219,886,077,407.50/42,624,266.40
  6. Step 6: Final answer
    x = 29,753,471.28

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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.