Home / 85,966,434.60-128,949,651.90-80,923,439.40

Finding the Fourth Proportional to 85,966,434.60, 128,949,651.90 and 80,923,439.40

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Solution

The fourth proportional to 85,966,434.60, 128,949,651.90 and 80,923,439.40 is: 121,385,159.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,966,434.60 : 128,949,651.90 = 80,923,439.40 : x
  2. Step 2: Convert to fraction form
    85,966,434.60/128,949,651.90 = 80,923,439.40/x
  3. Step 3: Cross multiply
    85,966,434.60x = 128,949,651.90 × 80,923,439.40
  4. Step 4: Simplify right side
    85,966,434.60x = 10,435,049,341,180,746
  5. Step 5: Solve for x
    x = 10,435,049,341,180,746/85,966,434.60
  6. Step 6: Final answer
    x = 121,385,159.10

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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.