Home / 78,635,620.20-117,953,430.30-70,415,999.40

Finding the Fourth Proportional to 78,635,620.20, 117,953,430.30 and 70,415,999.40

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Solution

The fourth proportional to 78,635,620.20, 117,953,430.30 and 70,415,999.40 is: 105,623,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,635,620.20 : 117,953,430.30 = 70,415,999.40 : x
  2. Step 2: Convert to fraction form
    78,635,620.20/117,953,430.30 = 70,415,999.40/x
  3. Step 3: Cross multiply
    78,635,620.20x = 117,953,430.30 × 70,415,999.40
  4. Step 4: Simplify right side
    78,635,620.20x = 8,305,808,677,232,742
  5. Step 5: Solve for x
    x = 8,305,808,677,232,742/78,635,620.20
  6. Step 6: Final answer
    x = 105,623,999.10

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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.