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Finding the Fourth Proportional to 72,637.59, 100,222.25 and 42,405.60

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Solution

The fourth proportional to 72,637.59, 100,222.25 and 42,405.60 is: 58,509.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,637.59 : 100,222.25 = 42,405.60 : x
  2. Step 2: Convert to fraction form
    72,637.59/100,222.25 = 42,405.60/x
  3. Step 3: Cross multiply
    72,637.59x = 100,222.25 × 42,405.60
  4. Step 4: Simplify right side
    72,637.59x = 4,249,984,432.57
  5. Step 5: Solve for x
    x = 4,249,984,432.57/72,637.59
  6. Step 6: Final answer
    x = 58,509.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.