Home / 390,746,166.68-585,994,803.24-128,369,814.86

Finding the Fourth Proportional to 390,746,166.68, 585,994,803.24 and 128,369,814.86

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Solution

The fourth proportional to 390,746,166.68, 585,994,803.24 and 128,369,814.86 is: 192,513,838.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,746,166.68 : 585,994,803.24 = 128,369,814.86 : x
  2. Step 2: Convert to fraction form
    390,746,166.68/585,994,803.24 = 128,369,814.86/x
  3. Step 3: Cross multiply
    390,746,166.68x = 585,994,803.24 × 128,369,814.86
  4. Step 4: Simplify right side
    390,746,166.68x = 75,224,044,402,787,296
  5. Step 5: Solve for x
    x = 75,224,044,402,787,296/390,746,166.68
  6. Step 6: Final answer
    x = 192,513,838.44

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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.