Home / 72,769.59-100,421.85-40,938.48

Finding the Fourth Proportional to 72,769.59, 100,421.85 and 40,938.48

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Solution

The fourth proportional to 72,769.59, 100,421.85 and 40,938.48 is: 56,495.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,769.59 : 100,421.85 = 40,938.48 : x
  2. Step 2: Convert to fraction form
    72,769.59/100,421.85 = 40,938.48/x
  3. Step 3: Cross multiply
    72,769.59x = 100,421.85 × 40,938.48
  4. Step 4: Simplify right side
    72,769.59x = 4,111,117,897.79
  5. Step 5: Solve for x
    x = 4,111,117,897.79/72,769.59
  6. Step 6: Final answer
    x = 56,495.00

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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.