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Finding the Fourth Proportional to 74,643.48, 112,004.10 and 70,340.76

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Solution

The fourth proportional to 74,643.48, 112,004.10 and 70,340.76 is: 105,547.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,643.48 : 112,004.10 = 70,340.76 : x
  2. Step 2: Convert to fraction form
    74,643.48/112,004.10 = 70,340.76/x
  3. Step 3: Cross multiply
    74,643.48x = 112,004.10 × 70,340.76
  4. Step 4: Simplify right side
    74,643.48x = 7,878,453,517.12
  5. Step 5: Solve for x
    x = 7,878,453,517.12/74,643.48
  6. Step 6: Final answer
    x = 105,547.78

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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.