Home / 120,870.40-181,305.60-76,547.20

Finding the Fourth Proportional to 120,870.40, 181,305.60 and 76,547.20

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Solution

The fourth proportional to 120,870.40, 181,305.60 and 76,547.20 is: 114,820.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,870.40 : 181,305.60 = 76,547.20 : x
  2. Step 2: Convert to fraction form
    120,870.40/181,305.60 = 76,547.20/x
  3. Step 3: Cross multiply
    120,870.40x = 181,305.60 × 76,547.20
  4. Step 4: Simplify right side
    120,870.40x = 13,878,436,024.32
  5. Step 5: Solve for x
    x = 13,878,436,024.32/120,870.40
  6. Step 6: Final answer
    x = 114,820.80

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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.