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Finding the Fourth Proportional to 78,609,973.32, 108,480,310.13 and 42,846,722.30

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Solution

The fourth proportional to 78,609,973.32, 108,480,310.13 and 42,846,722.30 is: 59,127,684.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,609,973.32 : 108,480,310.13 = 42,846,722.30 : x
  2. Step 2: Convert to fraction form
    78,609,973.32/108,480,310.13 = 42,846,722.30/x
  3. Step 3: Cross multiply
    78,609,973.32x = 108,480,310.13 × 42,846,722.30
  4. Step 4: Simplify right side
    78,609,973.32x = 4,648,025,722,401,352
  5. Step 5: Solve for x
    x = 4,648,025,722,401,352/78,609,973.32
  6. Step 6: Final answer
    x = 59,127,684.77

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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.