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Finding the Fourth Proportional to 142,396.60, 213,303.30 and 72,315.40

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Solution

The fourth proportional to 142,396.60, 213,303.30 and 72,315.40 is: 108,325.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,396.60 : 213,303.30 = 72,315.40 : x
  2. Step 2: Convert to fraction form
    142,396.60/213,303.30 = 72,315.40/x
  3. Step 3: Cross multiply
    142,396.60x = 213,303.30 × 72,315.40
  4. Step 4: Simplify right side
    142,396.60x = 15,425,113,460.82
  5. Step 5: Solve for x
    x = 15,425,113,460.82/142,396.60
  6. Step 6: Final answer
    x = 108,325.01

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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.