Home / 80,312.09-120,459.02-21,152.39

Finding the Fourth Proportional to 80,312.09, 120,459.02 and 21,152.39

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Solution

The fourth proportional to 80,312.09, 120,459.02 and 21,152.39 is: 31,726.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,312.09 : 120,459.02 = 21,152.39 : x
  2. Step 2: Convert to fraction form
    80,312.09/120,459.02 = 21,152.39/x
  3. Step 3: Cross multiply
    80,312.09x = 120,459.02 × 21,152.39
  4. Step 4: Simplify right side
    80,312.09x = 2,547,995,816.03
  5. Step 5: Solve for x
    x = 2,547,995,816.03/80,312.09
  6. Step 6: Final answer
    x = 31,726.18

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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.