Finding the Fourth Proportional to 249,990,587.13, 344,982,394.49 and 138,478,981.21
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Solution
The fourth proportional to 249,990,587.13, 344,982,394.49 and 138,478,981.21 is: 191,098,437.23
Step by Step Solution
- Step 1: Write the proportion equation
249,990,587.13 : 344,982,394.49 = 138,478,981.21 : x - Step 2: Convert to fraction form
249,990,587.13/344,982,394.49 = 138,478,981.21/x - Step 3: Cross multiply
249,990,587.13x = 344,982,394.49 × 138,478,981.21 - Step 4: Simplify right side
249,990,587.13x = 47,772,810,524,184,000 - Step 5: Solve for x
x = 47,772,810,524,184,000/249,990,587.13 - Step 6: Final answer
x = 191,098,437.23
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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.