Home / 81,001.60-121,502.40-72,246.40

Finding the Fourth Proportional to 81,001.60, 121,502.40 and 72,246.40

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Solution

The fourth proportional to 81,001.60, 121,502.40 and 72,246.40 is: 108,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,001.60 : 121,502.40 = 72,246.40 : x
  2. Step 2: Convert to fraction form
    81,001.60/121,502.40 = 72,246.40/x
  3. Step 3: Cross multiply
    81,001.60x = 121,502.40 × 72,246.40
  4. Step 4: Simplify right side
    81,001.60x = 8,778,110,991.36
  5. Step 5: Solve for x
    x = 8,778,110,991.36/81,001.60
  6. Step 6: Final answer
    x = 108,369.60

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1.5x scale

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.