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Finding the Fourth Proportional to 136,697,315.60, 205,045,973.40 and 40,959,203.60

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Solution

The fourth proportional to 136,697,315.60, 205,045,973.40 and 40,959,203.60 is: 61,438,805.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,697,315.60 : 205,045,973.40 = 40,959,203.60 : x
  2. Step 2: Convert to fraction form
    136,697,315.60/205,045,973.40 = 40,959,203.60/x
  3. Step 3: Cross multiply
    136,697,315.60x = 205,045,973.40 × 40,959,203.60
  4. Step 4: Simplify right side
    136,697,315.60x = 8,398,519,771,850,785
  5. Step 5: Solve for x
    x = 8,398,519,771,850,785/136,697,315.60
  6. Step 6: Final answer
    x = 61,438,805.40

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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.