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Finding the Fourth Proportional to 42,443.68, 63,353.96 and 39,316

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Solution

The fourth proportional to 42,443.68, 63,353.96 and 39,316 is: 58,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,443.68 : 63,353.96 = 39,316 : x
  2. Step 2: Convert to fraction form
    42,443.68/63,353.96 = 39,316/x
  3. Step 3: Cross multiply
    42,443.68x = 63,353.96 × 39,316
  4. Step 4: Simplify right side
    42,443.68x = 2,490,824,291.36
  5. Step 5: Solve for x
    x = 2,490,824,291.36/42,443.68
  6. Step 6: Final answer
    x = 58,685.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.