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Finding the Fourth Proportional to 118,457.71, 163,358.55 and 77,560.81

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Solution

The fourth proportional to 118,457.71, 163,358.55 and 77,560.81 is: 106,959.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,457.71 : 163,358.55 = 77,560.81 : x
  2. Step 2: Convert to fraction form
    118,457.71/163,358.55 = 77,560.81/x
  3. Step 3: Cross multiply
    118,457.71x = 163,358.55 × 77,560.81
  4. Step 4: Simplify right side
    118,457.71x = 12,670,221,458.43
  5. Step 5: Solve for x
    x = 12,670,221,458.43/118,457.71
  6. Step 6: Final answer
    x = 106,959.87

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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.