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Finding the Fourth Proportional to 118,289.79, 163,417.98 and 77,550.71

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Solution

The fourth proportional to 118,289.79, 163,417.98 and 77,550.71 is: 107,136.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,289.79 : 163,417.98 = 77,550.71 : x
  2. Step 2: Convert to fraction form
    118,289.79/163,417.98 = 77,550.71/x
  3. Step 3: Cross multiply
    118,289.79x = 163,417.98 × 77,550.71
  4. Step 4: Simplify right side
    118,289.79x = 12,673,180,375.77
  5. Step 5: Solve for x
    x = 12,673,180,375.77/118,289.79
  6. Step 6: Final answer
    x = 107,136.72

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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.