Home / 128,775,427.20-193,163,140.80-42,527,145.60

Finding the Fourth Proportional to 128,775,427.20, 193,163,140.80 and 42,527,145.60

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Solution

The fourth proportional to 128,775,427.20, 193,163,140.80 and 42,527,145.60 is: 63,790,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,775,427.20 : 193,163,140.80 = 42,527,145.60 : x
  2. Step 2: Convert to fraction form
    128,775,427.20/193,163,140.80 = 42,527,145.60/x
  3. Step 3: Cross multiply
    128,775,427.20x = 193,163,140.80 × 42,527,145.60
  4. Step 4: Simplify right side
    128,775,427.20x = 8,214,677,013,354,901
  5. Step 5: Solve for x
    x = 8,214,677,013,354,901/128,775,427.20
  6. Step 6: Final answer
    x = 63,790,718.40

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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.