Home / 128,736,400.80-193,104,601.20-31,691,337.60

Finding the Fourth Proportional to 128,736,400.80, 193,104,601.20 and 31,691,337.60

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Solution

The fourth proportional to 128,736,400.80, 193,104,601.20 and 31,691,337.60 is: 47,537,006.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,736,400.80 : 193,104,601.20 = 31,691,337.60 : x
  2. Step 2: Convert to fraction form
    128,736,400.80/193,104,601.20 = 31,691,337.60/x
  3. Step 3: Cross multiply
    128,736,400.80x = 193,104,601.20 × 31,691,337.60
  4. Step 4: Simplify right side
    128,736,400.80x = 6,119,743,108,742,565
  5. Step 5: Solve for x
    x = 6,119,743,108,742,565/128,736,400.80
  6. Step 6: Final answer
    x = 47,537,006.40

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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.