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Finding the Fourth Proportional to 156,124.87, 215,457.91 and 88,153.92

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Solution

The fourth proportional to 156,124.87, 215,457.91 and 88,153.92 is: 121,655.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,124.87 : 215,457.91 = 88,153.92 : x
  2. Step 2: Convert to fraction form
    156,124.87/215,457.91 = 88,153.92/x
  3. Step 3: Cross multiply
    156,124.87x = 215,457.91 × 88,153.92
  4. Step 4: Simplify right side
    156,124.87x = 18,993,459,141.12
  5. Step 5: Solve for x
    x = 18,993,459,141.12/156,124.87
  6. Step 6: Final answer
    x = 121,655.57

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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.