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Finding the Fourth Proportional to 247,011.63, 340,831.19 and 138,117.93

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Solution

The fourth proportional to 247,011.63, 340,831.19 and 138,117.93 is: 190,577.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,011.63 : 340,831.19 = 138,117.93 : x
  2. Step 2: Convert to fraction form
    247,011.63/340,831.19 = 138,117.93/x
  3. Step 3: Cross multiply
    247,011.63x = 340,831.19 × 138,117.93
  4. Step 4: Simplify right side
    247,011.63x = 47,074,900,385.18
  5. Step 5: Solve for x
    x = 47,074,900,385.18/247,011.63
  6. Step 6: Final answer
    x = 190,577.67

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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.