Finding the Fourth Proportional to 128,009,070.24, 176,633,513.80 and 77,747,133.46
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Solution
The fourth proportional to 128,009,070.24, 176,633,513.80 and 77,747,133.46 is: 107,279,502.50
Step by Step Solution
- Step 1: Write the proportion equation
128,009,070.24 : 176,633,513.80 = 77,747,133.46 : x - Step 2: Convert to fraction form
128,009,070.24/176,633,513.80 = 77,747,133.46/x - Step 3: Cross multiply
128,009,070.24x = 176,633,513.80 × 77,747,133.46 - Step 4: Simplify right side
128,009,070.24x = 13,732,749,370,917,352 - Step 5: Solve for x
x = 13,732,749,370,917,352/128,009,070.24 - Step 6: Final answer
x = 107,279,502.50
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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.