Finding the Fourth Proportional to 128,779.08, 177,752.14 and 77,783.70
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Solution
The fourth proportional to 128,779.08, 177,752.14 and 77,783.70 is: 107,363.86
Step by Step Solution
- Step 1: Write the proportion equation
128,779.08 : 177,752.14 = 77,783.70 : x - Step 2: Convert to fraction form
128,779.08/177,752.14 = 77,783.70/x - Step 3: Cross multiply
128,779.08x = 177,752.14 × 77,783.70 - Step 4: Simplify right side
128,779.08x = 13,826,219,132.12 - Step 5: Solve for x
x = 13,826,219,132.12/128,779.08 - Step 6: Final answer
x = 107,363.86
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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.