Finding the Fourth Proportional to 81,657,417.60, 122,486,126.40 and 78,886,051.20
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Solution
The fourth proportional to 81,657,417.60, 122,486,126.40 and 78,886,051.20 is: 118,329,076.80
Step by Step Solution
- Step 1: Write the proportion equation
81,657,417.60 : 122,486,126.40 = 78,886,051.20 : x - Step 2: Convert to fraction form
81,657,417.60/122,486,126.40 = 78,886,051.20/x - Step 3: Cross multiply
81,657,417.60x = 122,486,126.40 × 78,886,051.20 - Step 4: Simplify right side
81,657,417.60x = 9,662,446,838,480,072 - Step 5: Solve for x
x = 9,662,446,838,480,072/81,657,417.60 - Step 6: Final answer
x = 118,329,076.80
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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.