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Finding the Fourth Proportional to 136,688.90, 205,090.95 and 74,404.10

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Solution

The fourth proportional to 136,688.90, 205,090.95 and 74,404.10 is: 111,637.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,688.90 : 205,090.95 = 74,404.10 : x
  2. Step 2: Convert to fraction form
    136,688.90/205,090.95 = 74,404.10/x
  3. Step 3: Cross multiply
    136,688.90x = 205,090.95 × 74,404.10
  4. Step 4: Simplify right side
    136,688.90x = 15,259,607,552.90
  5. Step 5: Solve for x
    x = 15,259,607,552.90/136,688.90
  6. Step 6: Final answer
    x = 111,637.50

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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.