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Finding the Fourth Proportional to 136,402.47, 188,221.86 and 75,970.80

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Solution

The fourth proportional to 136,402.47, 188,221.86 and 75,970.80 is: 104,832.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,402.47 : 188,221.86 = 75,970.80 : x
  2. Step 2: Convert to fraction form
    136,402.47/188,221.86 = 75,970.80/x
  3. Step 3: Cross multiply
    136,402.47x = 188,221.86 × 75,970.80
  4. Step 4: Simplify right side
    136,402.47x = 14,299,365,281.69
  5. Step 5: Solve for x
    x = 14,299,365,281.69/136,402.47
  6. Step 6: Final answer
    x = 104,832.16

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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.