Finding the Fourth Proportional to 128,633,815.86, 177,514,279.40 and 69,896,660.18
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Solution
The fourth proportional to 128,633,815.86, 177,514,279.40 and 69,896,660.18 is: 96,457,181.04
Step by Step Solution
- Step 1: Write the proportion equation
128,633,815.86 : 177,514,279.40 = 69,896,660.18 : x - Step 2: Convert to fraction form
128,633,815.86/177,514,279.40 = 69,896,660.18/x - Step 3: Cross multiply
128,633,815.86x = 177,514,279.40 × 69,896,660.18 - Step 4: Simplify right side
128,633,815.86x = 12,407,655,264,319,376 - Step 5: Solve for x
x = 12,407,655,264,319,376/128,633,815.86 - Step 6: Final answer
x = 96,457,181.04
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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.