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Finding the Fourth Proportional to 12,312,078.30, 18,468,117.45 and 12,312,078.30

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Solution

The fourth proportional to 12,312,078.30, 18,468,117.45 and 12,312,078.30 is: 18,468,117.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312,078.30 : 18,468,117.45 = 12,312,078.30 : x
  2. Step 2: Convert to fraction form
    12,312,078.30/18,468,117.45 = 12,312,078.30/x
  3. Step 3: Cross multiply
    12,312,078.30x = 18,468,117.45 × 12,312,078.30
  4. Step 4: Simplify right side
    12,312,078.30x = 227,380,908,097,996.34
  5. Step 5: Solve for x
    x = 227,380,908,097,996.34/12,312,078.30
  6. Step 6: Final answer
    x = 18,468,117.45

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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.