Home / 85,966,432.60-128,949,648.90-80,923,437.40

Finding the Fourth Proportional to 85,966,432.60, 128,949,648.90 and 80,923,437.40

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Solution

The fourth proportional to 85,966,432.60, 128,949,648.90 and 80,923,437.40 is: 121,385,156.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,966,432.60 : 128,949,648.90 = 80,923,437.40 : x
  2. Step 2: Convert to fraction form
    85,966,432.60/128,949,648.90 = 80,923,437.40/x
  3. Step 3: Cross multiply
    85,966,432.60x = 128,949,648.90 × 80,923,437.40
  4. Step 4: Simplify right side
    85,966,432.60x = 10,435,048,840,511,130
  5. Step 5: Solve for x
    x = 10,435,048,840,511,130/85,966,432.60
  6. Step 6: Final answer
    x = 121,385,156.10

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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.