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Finding the Fourth Proportional to 57,312.60, 79,271.10 and 50,688.60

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Solution

The fourth proportional to 57,312.60, 79,271.10 and 50,688.60 is: 70,109.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,312.60 : 79,271.10 = 50,688.60 : x
  2. Step 2: Convert to fraction form
    57,312.60/79,271.10 = 50,688.60/x
  3. Step 3: Cross multiply
    57,312.60x = 79,271.10 × 50,688.60
  4. Step 4: Simplify right side
    57,312.60x = 4,018,141,079.46
  5. Step 5: Solve for x
    x = 4,018,141,079.46/57,312.60
  6. Step 6: Final answer
    x = 70,109.21

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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.