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Finding the Fourth Proportional to 145,419.60, 218,129.40 and 75,320.40

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Solution

The fourth proportional to 145,419.60, 218,129.40 and 75,320.40 is: 112,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,419.60 : 218,129.40 = 75,320.40 : x
  2. Step 2: Convert to fraction form
    145,419.60/218,129.40 = 75,320.40/x
  3. Step 3: Cross multiply
    145,419.60x = 218,129.40 × 75,320.40
  4. Step 4: Simplify right side
    145,419.60x = 16,429,593,659.76
  5. Step 5: Solve for x
    x = 16,429,593,659.76/145,419.60
  6. Step 6: Final answer
    x = 112,980.60

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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.