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Finding the Fourth Proportional to 78,752.64, 108,446.40 and 70,366.08

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Solution

The fourth proportional to 78,752.64, 108,446.40 and 70,366.08 is: 96,897.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,752.64 : 108,446.40 = 70,366.08 : x
  2. Step 2: Convert to fraction form
    78,752.64/108,446.40 = 70,366.08/x
  3. Step 3: Cross multiply
    78,752.64x = 108,446.40 × 70,366.08
  4. Step 4: Simplify right side
    78,752.64x = 7,630,948,058.11
  5. Step 5: Solve for x
    x = 7,630,948,058.11/78,752.64
  6. Step 6: Final answer
    x = 96,897.68

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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.