Finding the Fourth Proportional to 420,713,013.76, 631,137,327.36 and 129,580,040.32
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Solution
The fourth proportional to 420,713,013.76, 631,137,327.36 and 129,580,040.32 is: 194,390,945.02
Step by Step Solution
- Step 1: Write the proportion equation
420,713,013.76 : 631,137,327.36 = 129,580,040.32 : x - Step 2: Convert to fraction form
420,713,013.76/631,137,327.36 = 129,580,040.32/x - Step 3: Cross multiply
420,713,013.76x = 631,137,327.36 × 129,580,040.32 - Step 4: Simplify right side
420,713,013.76x = 81,782,800,326,765,840 - Step 5: Solve for x
x = 81,782,800,326,765,840/420,713,013.76 - Step 6: Final answer
x = 194,390,945.02
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.