Finding the Fourth Proportional to 128,122,349.55, 176,807,961.98 and 69,383,670.50
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Solution
The fourth proportional to 128,122,349.55, 176,807,961.98 and 69,383,670.50 is: 95,748,988.52
Step by Step Solution
- Step 1: Write the proportion equation
128,122,349.55 : 176,807,961.98 = 69,383,670.50 : x - Step 2: Convert to fraction form
128,122,349.55/176,807,961.98 = 69,383,670.50/x - Step 3: Cross multiply
128,122,349.55x = 176,807,961.98 × 69,383,670.50 - Step 4: Simplify right side
128,122,349.55x = 12,267,585,376,152,136 - Step 5: Solve for x
x = 12,267,585,376,152,136/128,122,349.55 - Step 6: Final answer
x = 95,748,988.52
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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.