Home / 390,455,168.04-585,680,215.14-99,319,803.48

Finding the Fourth Proportional to 390,455,168.04, 585,680,215.14 and 99,319,803.48

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Solution

The fourth proportional to 390,455,168.04, 585,680,215.14 and 99,319,803.48 is: 148,979,059.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,455,168.04 : 585,680,215.14 = 99,319,803.48 : x
  2. Step 2: Convert to fraction form
    390,455,168.04/585,680,215.14 = 99,319,803.48/x
  3. Step 3: Cross multiply
    390,455,168.04x = 585,680,215.14 × 99,319,803.48
  4. Step 4: Simplify right side
    390,455,168.04x = 58,169,643,869,828,920
  5. Step 5: Solve for x
    x = 58,169,643,869,828,920/390,455,168.04
  6. Step 6: Final answer
    x = 148,979,059.91

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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.