Home / 86,919,141.60-130,378,712.40-85,643,683.20

Finding the Fourth Proportional to 86,919,141.60, 130,378,712.40 and 85,643,683.20

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Solution

The fourth proportional to 86,919,141.60, 130,378,712.40 and 85,643,683.20 is: 128,465,524.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,919,141.60 : 130,378,712.40 = 85,643,683.20 : x
  2. Step 2: Convert to fraction form
    86,919,141.60/130,378,712.40 = 85,643,683.20/x
  3. Step 3: Cross multiply
    86,919,141.60x = 130,378,712.40 × 85,643,683.20
  4. Step 4: Simplify right side
    86,919,141.60x = 11,166,113,140,809,512
  5. Step 5: Solve for x
    x = 11,166,113,140,809,512/86,919,141.60
  6. Step 6: Final answer
    x = 128,465,524.80

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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.