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Finding the Fourth Proportional to 145,280.90, 217,921.35 and 66,548.90

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Solution

The fourth proportional to 145,280.90, 217,921.35 and 66,548.90 is: 99,823.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,280.90 : 217,921.35 = 66,548.90 : x
  2. Step 2: Convert to fraction form
    145,280.90/217,921.35 = 66,548.90/x
  3. Step 3: Cross multiply
    145,280.90x = 217,921.35 × 66,548.90
  4. Step 4: Simplify right side
    145,280.90x = 14,502,426,129.02
  5. Step 5: Solve for x
    x = 14,502,426,129.02/145,280.90
  6. Step 6: Final answer
    x = 99,823.35

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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.