Home / 56,779.68-85,089.20-31,490.40

Finding the Fourth Proportional to 56,779.68, 85,089.20 and 31,490.40

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Solution

The fourth proportional to 56,779.68, 85,089.20 and 31,490.40 is: 47,191.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,779.68 : 85,089.20 = 31,490.40 : x
  2. Step 2: Convert to fraction form
    56,779.68/85,089.20 = 31,490.40/x
  3. Step 3: Cross multiply
    56,779.68x = 85,089.20 × 31,490.40
  4. Step 4: Simplify right side
    56,779.68x = 2,679,492,943.68
  5. Step 5: Solve for x
    x = 2,679,492,943.68/56,779.68
  6. Step 6: Final answer
    x = 47,191.05

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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.