Home / 86,938,279.20-130,407,418.80-80,369,114.40

Finding the Fourth Proportional to 86,938,279.20, 130,407,418.80 and 80,369,114.40

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Solution

The fourth proportional to 86,938,279.20, 130,407,418.80 and 80,369,114.40 is: 120,553,671.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,938,279.20 : 130,407,418.80 = 80,369,114.40 : x
  2. Step 2: Convert to fraction form
    86,938,279.20/130,407,418.80 = 80,369,114.40/x
  3. Step 3: Cross multiply
    86,938,279.20x = 130,407,418.80 × 80,369,114.40
  4. Step 4: Simplify right side
    86,938,279.20x = 10,480,728,760,145,912
  5. Step 5: Solve for x
    x = 10,480,728,760,145,912/86,938,279.20
  6. Step 6: Final answer
    x = 120,553,671.60

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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.