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Finding the Fourth Proportional to 125,113.69, 187,199.69 and 87,746.70

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Solution

The fourth proportional to 125,113.69, 187,199.69 and 87,746.70 is: 131,289.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,113.69 : 187,199.69 = 87,746.70 : x
  2. Step 2: Convert to fraction form
    125,113.69/187,199.69 = 87,746.70/x
  3. Step 3: Cross multiply
    125,113.69x = 187,199.69 × 87,746.70
  4. Step 4: Simplify right side
    125,113.69x = 16,426,154,599.79
  5. Step 5: Solve for x
    x = 16,426,154,599.79/125,113.69
  6. Step 6: Final answer
    x = 131,289.83

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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.