Home / 76,345.32-105,378.10-53,689.62

Finding the Fourth Proportional to 76,345.32, 105,378.10 and 53,689.62

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Solution

The fourth proportional to 76,345.32, 105,378.10 and 53,689.62 is: 74,106.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,345.32 : 105,378.10 = 53,689.62 : x
  2. Step 2: Convert to fraction form
    76,345.32/105,378.10 = 53,689.62/x
  3. Step 3: Cross multiply
    76,345.32x = 105,378.10 × 53,689.62
  4. Step 4: Simplify right side
    76,345.32x = 5,657,710,145.32
  5. Step 5: Solve for x
    x = 5,657,710,145.32/76,345.32
  6. Step 6: Final answer
    x = 74,106.84

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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.