Home / 210,000.80-315,001.20-121,427.30

Finding the Fourth Proportional to 210,000.80, 315,001.20 and 121,427.30

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Solution

The fourth proportional to 210,000.80, 315,001.20 and 121,427.30 is: 182,140.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,000.80 : 315,001.20 = 121,427.30 : x
  2. Step 2: Convert to fraction form
    210,000.80/315,001.20 = 121,427.30/x
  3. Step 3: Cross multiply
    210,000.80x = 315,001.20 × 121,427.30
  4. Step 4: Simplify right side
    210,000.80x = 38,249,745,212.76
  5. Step 5: Solve for x
    x = 38,249,745,212.76/210,000.80
  6. Step 6: Final answer
    x = 182,140.95

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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.