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Finding the Fourth Proportional to 45,280.80, 67,921.20 and 42,000.30

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Solution

The fourth proportional to 45,280.80, 67,921.20 and 42,000.30 is: 63,000.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,280.80 : 67,921.20 = 42,000.30 : x
  2. Step 2: Convert to fraction form
    45,280.80/67,921.20 = 42,000.30/x
  3. Step 3: Cross multiply
    45,280.80x = 67,921.20 × 42,000.30
  4. Step 4: Simplify right side
    45,280.80x = 2,852,710,776.36
  5. Step 5: Solve for x
    x = 2,852,710,776.36/45,280.80
  6. Step 6: Final answer
    x = 63,000.45

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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.