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Finding the Fourth Proportional to 145,900.98, 218,853.63 and 40,720.50

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Solution

The fourth proportional to 145,900.98, 218,853.63 and 40,720.50 is: 61,081.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,900.98 : 218,853.63 = 40,720.50 : x
  2. Step 2: Convert to fraction form
    145,900.98/218,853.63 = 40,720.50/x
  3. Step 3: Cross multiply
    145,900.98x = 218,853.63 × 40,720.50
  4. Step 4: Simplify right side
    145,900.98x = 8,911,829,240.42
  5. Step 5: Solve for x
    x = 8,911,829,240.42/145,900.98
  6. Step 6: Final answer
    x = 61,081.35

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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.