Finding the Fourth Proportional to 420,639.08, 630,964.08 and 121,124.57
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Solution
The fourth proportional to 420,639.08, 630,964.08 and 121,124.57 is: 181,688.42
Step by Step Solution
- Step 1: Write the proportion equation
420,639.08 : 630,964.08 = 121,124.57 : x - Step 2: Convert to fraction form
420,639.08/630,964.08 = 121,124.57/x - Step 3: Cross multiply
420,639.08x = 630,964.08 × 121,124.57 - Step 4: Simplify right side
420,639.08x = 76,425,249,720.63 - Step 5: Solve for x
x = 76,425,249,720.63/420,639.08 - Step 6: Final answer
x = 181,688.42
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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.