Home / 78,635,619.20-117,953,428.80-70,415,998.40

Finding the Fourth Proportional to 78,635,619.20, 117,953,428.80 and 70,415,998.40

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Solution

The fourth proportional to 78,635,619.20, 117,953,428.80 and 70,415,998.40 is: 105,623,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,635,619.20 : 117,953,428.80 = 70,415,998.40 : x
  2. Step 2: Convert to fraction form
    78,635,619.20/117,953,428.80 = 70,415,998.40/x
  3. Step 3: Cross multiply
    78,635,619.20x = 117,953,428.80 × 70,415,998.40
  4. Step 4: Simplify right side
    78,635,619.20x = 8,305,808,453,655,314
  5. Step 5: Solve for x
    x = 8,305,808,453,655,314/78,635,619.20
  6. Step 6: Final answer
    x = 105,623,997.60

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1.5x scale

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.