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Finding the Fourth Proportional to 163,905,985.80, 245,858,978.70 and 156,347,713.80

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Solution

The fourth proportional to 163,905,985.80, 245,858,978.70 and 156,347,713.80 is: 234,521,570.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,905,985.80 : 245,858,978.70 = 156,347,713.80 : x
  2. Step 2: Convert to fraction form
    163,905,985.80/245,858,978.70 = 156,347,713.80/x
  3. Step 3: Cross multiply
    163,905,985.80x = 245,858,978.70 × 156,347,713.80
  4. Step 4: Simplify right side
    163,905,985.80x = 38,439,489,236,947,896
  5. Step 5: Solve for x
    x = 38,439,489,236,947,896/163,905,985.80
  6. Step 6: Final answer
    x = 234,521,570.70

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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.