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Finding the Fourth Proportional to 74,920.30, 112,322.85 and 42,088.30

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Solution

The fourth proportional to 74,920.30, 112,322.85 and 42,088.30 is: 63,100.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,920.30 : 112,322.85 = 42,088.30 : x
  2. Step 2: Convert to fraction form
    74,920.30/112,322.85 = 42,088.30/x
  3. Step 3: Cross multiply
    74,920.30x = 112,322.85 × 42,088.30
  4. Step 4: Simplify right side
    74,920.30x = 4,727,477,807.66
  5. Step 5: Solve for x
    x = 4,727,477,807.66/74,920.30
  6. Step 6: Final answer
    x = 63,100.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.