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Finding the Fourth Proportional to 72,858.70, 100,547.49 and 42,646.84

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Solution

The fourth proportional to 72,858.70, 100,547.49 and 42,646.84 is: 58,854.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,858.70 : 100,547.49 = 42,646.84 : x
  2. Step 2: Convert to fraction form
    72,858.70/100,547.49 = 42,646.84/x
  3. Step 3: Cross multiply
    72,858.70x = 100,547.49 × 42,646.84
  4. Step 4: Simplify right side
    72,858.70x = 4,288,032,718.43
  5. Step 5: Solve for x
    x = 4,288,032,718.43/72,858.70
  6. Step 6: Final answer
    x = 58,854.09

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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.