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Finding the Fourth Proportional to 105,510.57, 145,607.13 and 57,763.77

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Solution

The fourth proportional to 105,510.57, 145,607.13 and 57,763.77 is: 79,715.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,510.57 : 145,607.13 = 57,763.77 : x
  2. Step 2: Convert to fraction form
    105,510.57/145,607.13 = 57,763.77/x
  3. Step 3: Cross multiply
    105,510.57x = 145,607.13 × 57,763.77
  4. Step 4: Simplify right side
    105,510.57x = 8,410,816,767.68
  5. Step 5: Solve for x
    x = 8,410,816,767.68/105,510.57
  6. Step 6: Final answer
    x = 79,715.40

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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.