Finding the Fourth Proportional to 128,926,473.80, 193,389,710.70 and 103,417,305.80
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Solution
The fourth proportional to 128,926,473.80, 193,389,710.70 and 103,417,305.80 is: 155,125,958.70
Step by Step Solution
- Step 1: Write the proportion equation
128,926,473.80 : 193,389,710.70 = 103,417,305.80 : x - Step 2: Convert to fraction form
128,926,473.80/193,389,710.70 = 103,417,305.80/x - Step 3: Cross multiply
128,926,473.80x = 193,389,710.70 × 103,417,305.80 - Step 4: Simplify right side
128,926,473.80x = 19,999,842,850,035,432 - Step 5: Solve for x
x = 19,999,842,850,035,432/128,926,473.80 - Step 6: Final answer
x = 155,125,958.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.