Finding the Fourth Proportional to 78,918,258.98, 117,545,217.56 and 75,377,368.08
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Solution
The fourth proportional to 78,918,258.98, 117,545,217.56 and 75,377,368.08 is: 112,271,218.91
Step by Step Solution
- Step 1: Write the proportion equation
78,918,258.98 : 117,545,217.56 = 75,377,368.08 : x - Step 2: Convert to fraction form
78,918,258.98/117,545,217.56 = 75,377,368.08/x - Step 3: Cross multiply
78,918,258.98x = 117,545,217.56 × 75,377,368.08 - Step 4: Simplify right side
78,918,258.98x = 8,860,249,130,063,799 - Step 5: Solve for x
x = 8,860,249,130,063,799/78,918,258.98 - Step 6: Final answer
x = 112,271,218.91
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.