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Finding the Fourth Proportional to 42,722.40, 64,006.80 and 37,807.20

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Solution

The fourth proportional to 42,722.40, 64,006.80 and 37,807.20 is: 56,642.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,722.40 : 64,006.80 = 37,807.20 : x
  2. Step 2: Convert to fraction form
    42,722.40/64,006.80 = 37,807.20/x
  3. Step 3: Cross multiply
    42,722.40x = 64,006.80 × 37,807.20
  4. Step 4: Simplify right side
    42,722.40x = 2,419,917,888.96
  5. Step 5: Solve for x
    x = 2,419,917,888.96/42,722.40
  6. Step 6: Final answer
    x = 56,642.84

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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.