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Finding the Fourth Proportional to 74,645.82, 103,013.37 and 42,820.92

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Solution

The fourth proportional to 74,645.82, 103,013.37 and 42,820.92 is: 59,094.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,645.82 : 103,013.37 = 42,820.92 : x
  2. Step 2: Convert to fraction form
    74,645.82/103,013.37 = 42,820.92/x
  3. Step 3: Cross multiply
    74,645.82x = 103,013.37 × 42,820.92
  4. Step 4: Simplify right side
    74,645.82x = 4,411,127,275.70
  5. Step 5: Solve for x
    x = 4,411,127,275.70/74,645.82
  6. Step 6: Final answer
    x = 59,094.10

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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.