Finding the Fourth Proportional to 77,128,985.39, 115,694,156.05 and 19,621,317.38
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Solution
The fourth proportional to 77,128,985.39, 115,694,156.05 and 19,621,317.38 is: 29,432,148.54
Step by Step Solution
- Step 1: Write the proportion equation
77,128,985.39 : 115,694,156.05 = 19,621,317.38 : x - Step 2: Convert to fraction form
77,128,985.39/115,694,156.05 = 19,621,317.38/x - Step 3: Cross multiply
77,128,985.39x = 115,694,156.05 × 19,621,317.38 - Step 4: Simplify right side
77,128,985.39x = 2,270,071,754,240,773 - Step 5: Solve for x
x = 2,270,071,754,240,773/77,128,985.39 - Step 6: Final answer
x = 29,432,148.54
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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.