Home / 84,378,117.15-127,199,607.08-78,753,457.98

Finding the Fourth Proportional to 84,378,117.15, 127,199,607.08 and 78,753,457.98

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Solution

The fourth proportional to 84,378,117.15, 127,199,607.08 and 78,753,457.98 is: 118,720,460.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,378,117.15 : 127,199,607.08 = 78,753,457.98 : x
  2. Step 2: Convert to fraction form
    84,378,117.15/127,199,607.08 = 78,753,457.98/x
  3. Step 3: Cross multiply
    84,378,117.15x = 127,199,607.08 × 78,753,457.98
  4. Step 4: Simplify right side
    84,378,117.15x = 10,017,408,910,853,524
  5. Step 5: Solve for x
    x = 10,017,408,910,853,524/84,378,117.15
  6. Step 6: Final answer
    x = 118,720,460.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.