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Finding the Fourth Proportional to 75,045.65, 103,565.45 and 42,779.68

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Solution

The fourth proportional to 75,045.65, 103,565.45 and 42,779.68 is: 59,037.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,045.65 : 103,565.45 = 42,779.68 : x
  2. Step 2: Convert to fraction form
    75,045.65/103,565.45 = 42,779.68/x
  3. Step 3: Cross multiply
    75,045.65x = 103,565.45 × 42,779.68
  4. Step 4: Simplify right side
    75,045.65x = 4,430,496,810.06
  5. Step 5: Solve for x
    x = 4,430,496,810.06/75,045.65
  6. Step 6: Final answer
    x = 59,037.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.