Home / 137,670,107.40-189,995,854.77-78,938,236.98

Finding the Fourth Proportional to 137,670,107.40, 189,995,854.77 and 78,938,236.98

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Solution

The fourth proportional to 137,670,107.40, 189,995,854.77 and 78,938,236.98 is: 108,941,135.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,670,107.40 : 189,995,854.77 = 78,938,236.98 : x
  2. Step 2: Convert to fraction form
    137,670,107.40/189,995,854.77 = 78,938,236.98/x
  3. Step 3: Cross multiply
    137,670,107.40x = 189,995,854.77 × 78,938,236.98
  4. Step 4: Simplify right side
    137,670,107.40x = 14,997,937,809,051,926
  5. Step 5: Solve for x
    x = 14,997,937,809,051,926/137,670,107.40
  6. Step 6: Final answer
    x = 108,941,135.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.