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Finding the Fourth Proportional to 60,485.34, 90,742.90 and 21,042.80

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Solution

The fourth proportional to 60,485.34, 90,742.90 and 21,042.80 is: 31,569.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,485.34 : 90,742.90 = 21,042.80 : x
  2. Step 2: Convert to fraction form
    60,485.34/90,742.90 = 21,042.80/x
  3. Step 3: Cross multiply
    60,485.34x = 90,742.90 × 21,042.80
  4. Step 4: Simplify right side
    60,485.34x = 1,909,484,696.12
  5. Step 5: Solve for x
    x = 1,909,484,696.12/60,485.34
  6. Step 6: Final answer
    x = 31,569.38

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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.