Home / 72,769.16-100,416-40,931.90

Finding the Fourth Proportional to 72,769.16, 100,416 and 40,931.90

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Solution

The fourth proportional to 72,769.16, 100,416 and 40,931.90 is: 56,482.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,769.16 : 100,416 = 40,931.90 : x
  2. Step 2: Convert to fraction form
    72,769.16/100,416 = 40,931.90/x
  3. Step 3: Cross multiply
    72,769.16x = 100,416 × 40,931.90
  4. Step 4: Simplify right side
    72,769.16x = 4,110,217,670.40
  5. Step 5: Solve for x
    x = 4,110,217,670.40/72,769.16
  6. Step 6: Final answer
    x = 56,482.96

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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.