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Finding the Fourth Proportional to 78,670.80, 108,703.80 and 62,885.52

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Solution

The fourth proportional to 78,670.80, 108,703.80 and 62,885.52 is: 86,892.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,670.80 : 108,703.80 = 62,885.52 : x
  2. Step 2: Convert to fraction form
    78,670.80/108,703.80 = 62,885.52/x
  3. Step 3: Cross multiply
    78,670.80x = 108,703.80 × 62,885.52
  4. Step 4: Simplify right side
    78,670.80x = 6,835,894,988.98
  5. Step 5: Solve for x
    x = 6,835,894,988.98/78,670.80
  6. Step 6: Final answer
    x = 86,892.40

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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.