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Finding the Fourth Proportional to 98,570.40, 147,855.60 and 45,985.20

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Solution

The fourth proportional to 98,570.40, 147,855.60 and 45,985.20 is: 68,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,570.40 : 147,855.60 = 45,985.20 : x
  2. Step 2: Convert to fraction form
    98,570.40/147,855.60 = 45,985.20/x
  3. Step 3: Cross multiply
    98,570.40x = 147,855.60 × 45,985.20
  4. Step 4: Simplify right side
    98,570.40x = 6,799,169,337.12
  5. Step 5: Solve for x
    x = 6,799,169,337.12/98,570.40
  6. Step 6: Final answer
    x = 68,977.80

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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.