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Finding the Fourth Proportional to 121,125.60, 181,688.40 and 74,404.80

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Solution

The fourth proportional to 121,125.60, 181,688.40 and 74,404.80 is: 111,607.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,125.60 : 181,688.40 = 74,404.80 : x
  2. Step 2: Convert to fraction form
    121,125.60/181,688.40 = 74,404.80/x
  3. Step 3: Cross multiply
    121,125.60x = 181,688.40 × 74,404.80
  4. Step 4: Simplify right side
    121,125.60x = 13,518,489,064.32
  5. Step 5: Solve for x
    x = 13,518,489,064.32/121,125.60
  6. Step 6: Final answer
    x = 111,607.20

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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.