Finding the Fourth Proportional to 138,139,603.68, 190,630,232.24 and 76,258,350.56
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Solution
The fourth proportional to 138,139,603.68, 190,630,232.24 and 76,258,350.56 is: 105,235,187.38
Step by Step Solution
- Step 1: Write the proportion equation
138,139,603.68 : 190,630,232.24 = 76,258,350.56 : x - Step 2: Convert to fraction form
138,139,603.68/190,630,232.24 = 76,258,350.56/x - Step 3: Cross multiply
138,139,603.68x = 190,630,232.24 × 76,258,350.56 - Step 4: Simplify right side
138,139,603.68x = 14,537,147,077,492,136 - Step 5: Solve for x
x = 14,537,147,077,492,136/138,139,603.68 - Step 6: Final answer
x = 105,235,187.38
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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.