Home / 128,326,857.60-192,537,525.60-42,068,078.40

Finding the Fourth Proportional to 128,326,857.60, 192,537,525.60 and 42,068,078.40

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Solution

The fourth proportional to 128,326,857.60, 192,537,525.60 and 42,068,078.40 is: 63,117,603.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,326,857.60 : 192,537,525.60 = 42,068,078.40 : x
  2. Step 2: Convert to fraction form
    128,326,857.60/192,537,525.60 = 42,068,078.40/x
  3. Step 3: Cross multiply
    128,326,857.60x = 192,537,525.60 × 42,068,078.40
  4. Step 4: Simplify right side
    128,326,857.60x = 8,099,683,721,882,807
  5. Step 5: Solve for x
    x = 8,099,683,721,882,807/128,326,857.60
  6. Step 6: Final answer
    x = 63,117,603.54

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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.