Home / 77,931.51-107,545.45-42,121.52

Finding the Fourth Proportional to 77,931.51, 107,545.45 and 42,121.52

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Solution

The fourth proportional to 77,931.51, 107,545.45 and 42,121.52 is: 58,127.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,931.51 : 107,545.45 = 42,121.52 : x
  2. Step 2: Convert to fraction form
    77,931.51/107,545.45 = 42,121.52/x
  3. Step 3: Cross multiply
    77,931.51x = 107,545.45 × 42,121.52
  4. Step 4: Simplify right side
    77,931.51x = 4,529,977,823.08
  5. Step 5: Solve for x
    x = 4,529,977,823.08/77,931.51
  6. Step 6: Final answer
    x = 58,127.68

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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.