Finding the Fourth Proportional to 128,520,356.40, 177,353,117.44 and 69,781,677.12
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Solution
The fourth proportional to 128,520,356.40, 177,353,117.44 and 69,781,677.12 is: 96,296,013.52
Step by Step Solution
- Step 1: Write the proportion equation
128,520,356.40 : 177,353,117.44 = 69,781,677.12 : x - Step 2: Convert to fraction form
128,520,356.40/177,353,117.44 = 69,781,677.12/x - Step 3: Cross multiply
128,520,356.40x = 177,353,117.44 × 69,781,677.12 - Step 4: Simplify right side
128,520,356.40x = 12,375,997,977,423,522 - Step 5: Solve for x
x = 12,375,997,977,423,522/128,520,356.40 - Step 6: Final answer
x = 96,296,013.52
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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.