Home / 113,124.36-156,148.20-81,385.50

Finding the Fourth Proportional to 113,124.36, 156,148.20 and 81,385.50

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Solution

The fourth proportional to 113,124.36, 156,148.20 and 81,385.50 is: 112,338.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,124.36 : 156,148.20 = 81,385.50 : x
  2. Step 2: Convert to fraction form
    113,124.36/156,148.20 = 81,385.50/x
  3. Step 3: Cross multiply
    113,124.36x = 156,148.20 × 81,385.50
  4. Step 4: Simplify right side
    113,124.36x = 12,708,199,331.10
  5. Step 5: Solve for x
    x = 12,708,199,331.10/113,124.36
  6. Step 6: Final answer
    x = 112,338.31

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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.