Finding the Fourth Proportional to 74,139.21, 102,319.47 and 42,312.92
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Solution
The fourth proportional to 74,139.21, 102,319.47 and 42,312.92 is: 58,396.02
Step by Step Solution
- Step 1: Write the proportion equation
74,139.21 : 102,319.47 = 42,312.92 : x - Step 2: Convert to fraction form
74,139.21/102,319.47 = 42,312.92/x - Step 3: Cross multiply
74,139.21x = 102,319.47 × 42,312.92 - Step 4: Simplify right side
74,139.21x = 4,329,435,036.96 - Step 5: Solve for x
x = 4,329,435,036.96/74,139.21 - Step 6: Final answer
x = 58,396.02
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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.