Home / 162,000.40-243,000.60-128,539.30

Finding the Fourth Proportional to 162,000.40, 243,000.60 and 128,539.30

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Solution

The fourth proportional to 162,000.40, 243,000.60 and 128,539.30 is: 192,808.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,000.40 : 243,000.60 = 128,539.30 : x
  2. Step 2: Convert to fraction form
    162,000.40/243,000.60 = 128,539.30/x
  3. Step 3: Cross multiply
    162,000.40x = 243,000.60 × 128,539.30
  4. Step 4: Simplify right side
    162,000.40x = 31,235,127,023.58
  5. Step 5: Solve for x
    x = 31,235,127,023.58/162,000.40
  6. Step 6: Final answer
    x = 192,808.95

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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.