Finding the Fourth Proportional to 90,830.60, 125,349.12 and 56,828.18
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Solution
The fourth proportional to 90,830.60, 125,349.12 and 56,828.18 is: 78,424.70
Step by Step Solution
- Step 1: Write the proportion equation
90,830.60 : 125,349.12 = 56,828.18 : x - Step 2: Convert to fraction form
90,830.60/125,349.12 = 56,828.18/x - Step 3: Cross multiply
90,830.60x = 125,349.12 × 56,828.18 - Step 4: Simplify right side
90,830.60x = 7,123,362,354.20 - Step 5: Solve for x
x = 7,123,362,354.20/90,830.60 - Step 6: Final answer
x = 78,424.70
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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.