Home / 120,547.20-180,621.36-85,424.16

Finding the Fourth Proportional to 120,547.20, 180,621.36 and 85,424.16

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Solution

The fourth proportional to 120,547.20, 180,621.36 and 85,424.16 is: 127,994.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,547.20 : 180,621.36 = 85,424.16 : x
  2. Step 2: Convert to fraction form
    120,547.20/180,621.36 = 85,424.16/x
  3. Step 3: Cross multiply
    120,547.20x = 180,621.36 × 85,424.16
  4. Step 4: Simplify right side
    120,547.20x = 15,429,427,956.06
  5. Step 5: Solve for x
    x = 15,429,427,956.06/120,547.20
  6. Step 6: Final answer
    x = 127,994.91

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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.