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Finding the Fourth Proportional to 145,308.40, 217,919.40 and 56,510.80

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Solution

The fourth proportional to 145,308.40, 217,919.40 and 56,510.80 is: 84,749.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,308.40 : 217,919.40 = 56,510.80 : x
  2. Step 2: Convert to fraction form
    145,308.40/217,919.40 = 56,510.80/x
  3. Step 3: Cross multiply
    145,308.40x = 217,919.40 × 56,510.80
  4. Step 4: Simplify right side
    145,308.40x = 12,314,799,629.52
  5. Step 5: Solve for x
    x = 12,314,799,629.52/145,308.40
  6. Step 6: Final answer
    x = 84,749.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.