Home / 86,920,012.60-130,380,018.90-85,644,554.20

Finding the Fourth Proportional to 86,920,012.60, 130,380,018.90 and 85,644,554.20

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Solution

The fourth proportional to 86,920,012.60, 130,380,018.90 and 85,644,554.20 is: 128,466,831.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,920,012.60 : 130,380,018.90 = 85,644,554.20 : x
  2. Step 2: Convert to fraction form
    86,920,012.60/130,380,018.90 = 85,644,554.20/x
  3. Step 3: Cross multiply
    86,920,012.60x = 130,380,018.90 × 85,644,554.20
  4. Step 4: Simplify right side
    86,920,012.60x = 11,166,338,595,278,076
  5. Step 5: Solve for x
    x = 11,166,338,595,278,076/86,920,012.60
  6. Step 6: Final answer
    x = 128,466,831.30

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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.