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Finding the Fourth Proportional to 152,138.58, 228,298.72 and 81,113.93

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Solution

The fourth proportional to 152,138.58, 228,298.72 and 81,113.93 is: 121,719.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,138.58 : 228,298.72 = 81,113.93 : x
  2. Step 2: Convert to fraction form
    152,138.58/228,298.72 = 81,113.93/x
  3. Step 3: Cross multiply
    152,138.58x = 228,298.72 × 81,113.93
  4. Step 4: Simplify right side
    152,138.58x = 18,518,206,393.17
  5. Step 5: Solve for x
    x = 18,518,206,393.17/152,138.58
  6. Step 6: Final answer
    x = 121,719.33

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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.