Home / 128,780,807.20-193,171,210.80-87,966,138.40

Finding the Fourth Proportional to 128,780,807.20, 193,171,210.80 and 87,966,138.40

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Solution

The fourth proportional to 128,780,807.20, 193,171,210.80 and 87,966,138.40 is: 131,949,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,780,807.20 : 193,171,210.80 = 87,966,138.40 : x
  2. Step 2: Convert to fraction form
    128,780,807.20/193,171,210.80 = 87,966,138.40/x
  3. Step 3: Cross multiply
    128,780,807.20x = 193,171,210.80 × 87,966,138.40
  4. Step 4: Simplify right side
    128,780,807.20x = 16,992,525,464,128,376
  5. Step 5: Solve for x
    x = 16,992,525,464,128,376/128,780,807.20
  6. Step 6: Final answer
    x = 131,949,207.60

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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.