Finding the Fourth Proportional to 86,208,020.80, 129,312,031.20 and 76,854,659.20
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Solution
The fourth proportional to 86,208,020.80, 129,312,031.20 and 76,854,659.20 is: 115,281,988.80
Step by Step Solution
- Step 1: Write the proportion equation
86,208,020.80 : 129,312,031.20 = 76,854,659.20 : x - Step 2: Convert to fraction form
86,208,020.80/129,312,031.20 = 76,854,659.20/x - Step 3: Cross multiply
86,208,020.80x = 129,312,031.20 × 76,854,659.20 - Step 4: Simplify right side
86,208,020.80x = 9,938,232,088,335,768 - Step 5: Solve for x
x = 9,938,232,088,335,768/86,208,020.80 - Step 6: Final answer
x = 115,281,988.80
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1.5x scale
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.