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Finding the Fourth Proportional to 72,303.66, 99,774.36 and 40,472.28

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Solution

The fourth proportional to 72,303.66, 99,774.36 and 40,472.28 is: 55,849.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,303.66 : 99,774.36 = 40,472.28 : x
  2. Step 2: Convert to fraction form
    72,303.66/99,774.36 = 40,472.28/x
  3. Step 3: Cross multiply
    72,303.66x = 99,774.36 × 40,472.28
  4. Step 4: Simplify right side
    72,303.66x = 4,038,095,834.74
  5. Step 5: Solve for x
    x = 4,038,095,834.74/72,303.66
  6. Step 6: Final answer
    x = 55,849.12

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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.