Home / 143,315.40-214,973.10-90,784.20

Finding the Fourth Proportional to 143,315.40, 214,973.10 and 90,784.20

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Solution

The fourth proportional to 143,315.40, 214,973.10 and 90,784.20 is: 136,176.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,315.40 : 214,973.10 = 90,784.20 : x
  2. Step 2: Convert to fraction form
    143,315.40/214,973.10 = 90,784.20/x
  3. Step 3: Cross multiply
    143,315.40x = 214,973.10 × 90,784.20
  4. Step 4: Simplify right side
    143,315.40x = 19,516,160,905.02
  5. Step 5: Solve for x
    x = 19,516,160,905.02/143,315.40
  6. Step 6: Final answer
    x = 136,176.30

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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.