Finding the Fourth Proportional to 128,547,381.52, 177,449,674.70 and 86,788,018.63
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Solution
The fourth proportional to 128,547,381.52, 177,449,674.70 and 86,788,018.63 is: 119,804,118.07
Step by Step Solution
- Step 1: Write the proportion equation
128,547,381.52 : 177,449,674.70 = 86,788,018.63 : x - Step 2: Convert to fraction form
128,547,381.52/177,449,674.70 = 86,788,018.63/x - Step 3: Cross multiply
128,547,381.52x = 177,449,674.70 × 86,788,018.63 - Step 4: Simplify right side
128,547,381.52x = 15,400,505,672,429,850 - Step 5: Solve for x
x = 15,400,505,672,429,850/128,547,381.52 - Step 6: Final answer
x = 119,804,118.07
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.