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Finding the Fourth Proportional to 129,457.55, 178,651.44 and 75,752.88

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Solution

The fourth proportional to 129,457.55, 178,651.44 and 75,752.88 is: 104,538.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,457.55 : 178,651.44 = 75,752.88 : x
  2. Step 2: Convert to fraction form
    129,457.55/178,651.44 = 75,752.88/x
  3. Step 3: Cross multiply
    129,457.55x = 178,651.44 × 75,752.88
  4. Step 4: Simplify right side
    129,457.55x = 13,533,360,426.20
  5. Step 5: Solve for x
    x = 13,533,360,426.20/129,457.55
  6. Step 6: Final answer
    x = 104,538.98

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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.