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Finding the Fourth Proportional to 30,909,985.40, 46,364,978.10 and 19,563,246.20

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Solution

The fourth proportional to 30,909,985.40, 46,364,978.10 and 19,563,246.20 is: 29,344,869.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,909,985.40 : 46,364,978.10 = 19,563,246.20 : x
  2. Step 2: Convert to fraction form
    30,909,985.40/46,364,978.10 = 19,563,246.20/x
  3. Step 3: Cross multiply
    30,909,985.40x = 46,364,978.10 × 19,563,246.20
  4. Step 4: Simplify right side
    30,909,985.40x = 907,049,481,627,908.25
  5. Step 5: Solve for x
    x = 907,049,481,627,908.25/30,909,985.40
  6. Step 6: Final answer
    x = 29,344,869.30

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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.