Home / 128,736,187.20-193,104,280.80-42,487,905.60

Finding the Fourth Proportional to 128,736,187.20, 193,104,280.80 and 42,487,905.60

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Solution

The fourth proportional to 128,736,187.20, 193,104,280.80 and 42,487,905.60 is: 63,731,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,736,187.20 : 193,104,280.80 = 42,487,905.60 : x
  2. Step 2: Convert to fraction form
    128,736,187.20/193,104,280.80 = 42,487,905.60/x
  3. Step 3: Cross multiply
    128,736,187.20x = 193,104,280.80 × 42,487,905.60
  4. Step 4: Simplify right side
    128,736,187.20x = 8,204,596,453,586,293
  5. Step 5: Solve for x
    x = 8,204,596,453,586,293/128,736,187.20
  6. Step 6: Final answer
    x = 63,731,858.40

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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.