Home / 78,169,645.20-117,254,467.80-65,628,512.40

Finding the Fourth Proportional to 78,169,645.20, 117,254,467.80 and 65,628,512.40

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Solution

The fourth proportional to 78,169,645.20, 117,254,467.80 and 65,628,512.40 is: 98,442,768.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,169,645.20 : 117,254,467.80 = 65,628,512.40 : x
  2. Step 2: Convert to fraction form
    78,169,645.20/117,254,467.80 = 65,628,512.40/x
  3. Step 3: Cross multiply
    78,169,645.20x = 117,254,467.80 × 65,628,512.40
  4. Step 4: Simplify right side
    78,169,645.20x = 7,695,236,293,967,700
  5. Step 5: Solve for x
    x = 7,695,236,293,967,700/78,169,645.20
  6. Step 6: Final answer
    x = 98,442,768.60

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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.