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Finding the Fourth Proportional to 145,781.80, 218,607.90 and 57,005.80

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Solution

The fourth proportional to 145,781.80, 218,607.90 and 57,005.80 is: 85,483.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,781.80 : 218,607.90 = 57,005.80 : x
  2. Step 2: Convert to fraction form
    145,781.80/218,607.90 = 57,005.80/x
  3. Step 3: Cross multiply
    145,781.80x = 218,607.90 × 57,005.80
  4. Step 4: Simplify right side
    145,781.80x = 12,461,918,225.82
  5. Step 5: Solve for x
    x = 12,461,918,225.82/145,781.80
  6. Step 6: Final answer
    x = 85,483.36

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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.