Finding the Fourth Proportional to 91,977,128.51, 138,023,130.44 and 61,293,238.29
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Solution
The fourth proportional to 91,977,128.51, 138,023,130.44 and 61,293,238.29 is: 91,978,133.70
Step by Step Solution
- Step 1: Write the proportion equation
91,977,128.51 : 138,023,130.44 = 61,293,238.29 : x - Step 2: Convert to fraction form
91,977,128.51/138,023,130.44 = 61,293,238.29/x - Step 3: Cross multiply
91,977,128.51x = 138,023,130.44 × 61,293,238.29 - Step 4: Simplify right side
91,977,128.51x = 8,459,884,623,590,672 - Step 5: Solve for x
x = 8,459,884,623,590,672/91,977,128.51 - Step 6: Final answer
x = 91,978,133.70
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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.