Finding the Fourth Proportional to 78,143,862.18, 107,834,836.28 and 43,335,805.28
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Solution
The fourth proportional to 78,143,862.18, 107,834,836.28 and 43,335,805.28 is: 59,801,362.99
Step by Step Solution
- Step 1: Write the proportion equation
78,143,862.18 : 107,834,836.28 = 43,335,805.28 : x - Step 2: Convert to fraction form
78,143,862.18/107,834,836.28 = 43,335,805.28/x - Step 3: Cross multiply
78,143,862.18x = 107,834,836.28 × 43,335,805.28 - Step 4: Simplify right side
78,143,862.18x = 4,673,109,467,430,760 - Step 5: Solve for x
x = 4,673,109,467,430,760/78,143,862.18 - Step 6: Final answer
x = 59,801,362.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.