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Finding the Fourth Proportional to 42,700.80, 64,051.20 and 18,124.80

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Solution

The fourth proportional to 42,700.80, 64,051.20 and 18,124.80 is: 27,187.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,700.80 : 64,051.20 = 18,124.80 : x
  2. Step 2: Convert to fraction form
    42,700.80/64,051.20 = 18,124.80/x
  3. Step 3: Cross multiply
    42,700.80x = 64,051.20 × 18,124.80
  4. Step 4: Simplify right side
    42,700.80x = 1,160,915,189.76
  5. Step 5: Solve for x
    x = 1,160,915,189.76/42,700.80
  6. Step 6: Final answer
    x = 27,187.20

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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.