Home / 128,724,903.20-193,087,354.80-76,992,730.40

Finding the Fourth Proportional to 128,724,903.20, 193,087,354.80 and 76,992,730.40

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Solution

The fourth proportional to 128,724,903.20, 193,087,354.80 and 76,992,730.40 is: 115,489,095.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,724,903.20 : 193,087,354.80 = 76,992,730.40 : x
  2. Step 2: Convert to fraction form
    128,724,903.20/193,087,354.80 = 76,992,730.40/x
  3. Step 3: Cross multiply
    128,724,903.20x = 193,087,354.80 × 76,992,730.40
  4. Step 4: Simplify right side
    128,724,903.20x = 14,866,322,651,765,548
  5. Step 5: Solve for x
    x = 14,866,322,651,765,548/128,724,903.20
  6. Step 6: Final answer
    x = 115,489,095.60

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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.