Finding the Fourth Proportional to 128,931,564.97, 177,940,985.87 and 76,020,249.25
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Solution
The fourth proportional to 128,931,564.97, 177,940,985.87 and 76,020,249.25 is: 104,917,039.52
Step by Step Solution
- Step 1: Write the proportion equation
128,931,564.97 : 177,940,985.87 = 76,020,249.25 : x - Step 2: Convert to fraction form
128,931,564.97/177,940,985.87 = 76,020,249.25/x - Step 3: Cross multiply
128,931,564.97x = 177,940,985.87 × 76,020,249.25 - Step 4: Simplify right side
128,931,564.97x = 13,527,118,096,358,324 - Step 5: Solve for x
x = 13,527,118,096,358,324/128,931,564.97 - Step 6: Final answer
x = 104,917,039.52
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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.