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Finding the Fourth Proportional to 81,423.95, 121,955.47 and 62,565.17

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Solution

The fourth proportional to 81,423.95, 121,955.47 and 62,565.17 is: 93,709.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,423.95 : 121,955.47 = 62,565.17 : x
  2. Step 2: Convert to fraction form
    81,423.95/121,955.47 = 62,565.17/x
  3. Step 3: Cross multiply
    81,423.95x = 121,955.47 × 62,565.17
  4. Step 4: Simplify right side
    81,423.95x = 7,630,163,946.79
  5. Step 5: Solve for x
    x = 7,630,163,946.79/81,423.95
  6. Step 6: Final answer
    x = 93,709.09

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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.