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Finding the Fourth Proportional to 42,496,978.40, 63,598,501.20 and 25,469,871.20

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Solution

The fourth proportional to 42,496,978.40, 63,598,501.20 and 25,469,871.20 is: 38,116,724.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,496,978.40 : 63,598,501.20 = 25,469,871.20 : x
  2. Step 2: Convert to fraction form
    42,496,978.40/63,598,501.20 = 25,469,871.20/x
  3. Step 3: Cross multiply
    42,496,978.40x = 63,598,501.20 × 25,469,871.20
  4. Step 4: Simplify right side
    42,496,978.40x = 1,619,845,634,077,045.50
  5. Step 5: Solve for x
    x = 1,619,845,634,077,045.50/42,496,978.40
  6. Step 6: Final answer
    x = 38,116,724.88

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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.